2018-19シーズンのボストン・セルティックスは全米バスケットボール協会(NBA)のフランチャイズ73年目のシーズン。

レギュラーシーズンではカンファレンス4位、プレーオフではインディアナ・ペイサーズを破り3年連続で準決勝に進出したものの、ヤニス・アデトクンボなどを擁するミルウォーキー・バックスに5試合目で敗退した。

バックスとの準決勝の数日前、セルティックスの球団OBでバスケットボール殿堂のジョン・ハブリチェックが4月25日に79歳で亡くなった。それを受けて、チームはバックスとのシリーズ第1戦に17番と刻んだ白と黒のバンドを着用した。

ヘッドコーチはブラッド・スティーブンス（6シーズン目）、キャプテンはカイリー・アービング、チーム内得点王もアービング。

ドラフト選考

巡 指名順 選手名 ポジション 国籍 出身校など 1 27 ロバート・ウィリアムズ PF テキサスA&M大学 ロースター TW：2way契約 C：チームキャプテン ポジション 背番号 名前 身長 体重 出身 C 46 アロン・ベインズ 208cm 118kg ワシントン州立大学 SG/SF 7 ジェイレン・ブラウン 201cm 100kg カリフォルニア大学バークレー校 PG 50 (TW) 198cm 93kg サウスカロライナ大学 PG 1 188cm 84kg ニューメキシコ州立大学 SF 20 ゴードン・ヘイワード 203cm 102kg バトラー大学 PF/C 42 アル・ホーフォード 208cm 111kg フロリダ大学 SG 28 (TW) 196cm 84kg ジョージア州立大学 PG 11 カイリー・アービング(C) 191cm 88kg デューク大学 PF 13 マーカス・モリス 208cm 107kg カンザス大学 PF/SF 37 セミ・オジェレエ 201cm 109kg 南メソジスト大学 PG 12 テリー・ロジアー 185cm 86kg ルイビル大学 SG 36 マーカス・スマート 193cm 100kg オクラホマ州立大学 SF/PF 0 ジェイソン・テイタム 203cm 94kg デューク大学 レギュラーシーズン成績 DR = ディビジョン順位, CR = カンファレンス順位,PCT = 勝率 Z = 全体でホームコートアドバンテージ,ｘ = カンファレンスでホームコートアドバンテージ イースタン・カンファレンス アトランティック・ディビジョン DR CR チーム 勝 敗 PCT 1 2 トロント・ラプターズ 5824 0.707 2 3 フィラデルフィア・セブンティシクサーズ5131 0.622 3 4 ボストン・セルティックス4933 0.598 4 6 ブルックリン・ネッツ 4240 0.512 5 15 ニューヨーク・ニックス1765 0.207

試合記録

プレシーズン

|- style="background:#fcc" | 1 | September 28 | @ Charlotte | 97–104 | Brown (14) | Ojeleye (8) | Horford, Irving (3) | Dean Smith Center18,081 | 0–1 |- style="background:#bfb" | 2 | September 30 | Charlotte | 115–112 | Irving (20) | Baynes, Morris (6) | Irving, Rozier (4) | TD Garden18,624 | 1–1 |- style="background:#fcc" | 3 | October 2 | Cleveland | 95–102 | Smart (15) | Baynes (7) | Horford (4) | TD Garden18,624 | 1–2 |- style="background:#fcc" | 4 | October 6 | @ Cleveland | 102–113 | Morris, Rozier (17) | Baynes (6) | Horford (7) | Quicken Loans Arena17,083 | 1–3

レギュラーシーズン

|- style="background:#cfc | 1 | October 16 | Philadelphia | 105–87 | Jayson Tatum (23) | Marcus Morris (10) | Kyrie Irving (7) | TD Garden18,624 | 1–0 |- style="background:#fcc | 2 | October 19 | @ Toronto | 101–113 | Kyrie Irving (21) | Al Horford (10) | Kyrie Irving (6) | Scotiabank Arena19,800 | 1–1 |- style="background:#cfc | 3 | October 20 | @ New York | 103–101 | Jayson Tatum (24) | Jayson Tatum (14) | Irving, Smart (5) | Madison Square Garden19,427 | 2–1 |- style="background:#fcc | 4 | October 22 | Orlando | 90–93 | Kyrie Irving (29) | Jayson Tatum (10) | Kyrie Irving (5) | TD Garden18,624 | 2–2 |- style="background:#cfc | 5 | October 25 | @ Oklahoma City | 101–95 | Jayson Tatum (24) | Marcus Morris (10) | Kyrie Irving (5) | Chesapeake Energy Arena18,203 | 3–2 |- style="background:#cfc | 6 | October 27 | @ Detroit | 109–89 | Jaylen Brown (19) | Morris, Theis (8) | Marcus Smart (9) | Little Caesars Arena18,120 | 4–2 |- style="background:#cfc | 7 | October 30 | Detroit | 108–105 | Kyrie Irving (31) | Marcus Morris (9) | Kyrie Irving (5) | TD Garden18,624 | 5–2

|- style="background:#cfc | 8 | November 1 | Milwaukee | 117–113 | Kyrie Irving (28) | Terry Rozier (7) | Al Horford (8) | TD Garden18,624 | 6–2 |- style="background:#fcc | 9 | November 3 | @ Indiana | 101–102 | Marcus Morris (23) | Brown, Hayward (7) | Marcus Smart (9) | Bankers Life Fieldhouse17,505 | 6–3 |- style="background:#fcc | 10 | November 5 | @ Denver | 107–115 | Kyrie Irving (31) | Gordon Hayward (9) | Al Horford (6) | Pepsi Center19,520 | 6–4 |- style="background:#cfc | 11 | November 8 | @ Phoenix | 116–109 (OT) | Kyrie Irving (39) | Morris, Tatum (8) | Kyrie Irving (6) | Talking Stick Resort Arena17,359 | 7–4 |- style="background:#fcc | 12 | November 9 | @ Utah | 115–123 | Terry Rozier (22) | Terry Rozier (6) | Marcus Smart (10) | Vivint Smart Home Arena18,306 | 7–5 |- style="background:#fcc | 13 | November 11 | @ Portland | 94–100 | Jayson Tatum (27) | Gordon Hayward (9) | Kyrie Irving (6) | Moda Center19,712 | 7–6 |- style="background:#cfc | 14 | November 14 | Chicago | 111–82 | Jaylen Brown (18) | Aron Baynes (11) | Kyrie Irving (7) | TD Garden18,624 | 8–6 |- style="background:#cfc | 15 | November 16 | Toronto | 123–116 (OT) | Kyrie Irving (43) | Al Horford (9) | Kyrie Irving (11) | TD Garden18,624 | 9–6 |- style="background:#fcc | 16 | November 17 | Utah | 86–98 | Kyrie Irving (20) | Kyrie Irving (8) | Hayward, Smart, Rozier (3) | TD Garden18,624 | 9–7 |-style="background:#fcc | 17 | November 19 | @ Charlotte | 112–117 | Kyrie Irving (27) | Gordon Hayward (8) | Kyrie Irving (11) | Spectrum Center18,040 | 9–8 |-style="background:#fcc | 18 | November 21 | New York | 109–117 |Kyrie Irving (22) |Morris, Tatum (8) |Kyrie Irving (13) | TD Garden18,624 | 9–9 |-style="background:#cfc | 19 | November 23 | @ Atlanta |114–96 | Aron Baynes (16) | Aron Baynes (9) | Marcus Smart (7) | State Farm Arena15,017 | 10–9 |- style="background:#fcc;" | 20 | November 24 | @ Dallas | 104–113 | Jayson Tatum (21) | Aron Baynes (9) | Kyrie Irving (6) | American Airlines Center20,226 | 10–10 |- style="background:#cfc;" | 21 | November 26 | @ New Orleans | 124–107 | Kyrie Irving (26) | Marcus Morris (11) | Kyrie Irving (10) | Smoothie King Center15,189 | 11–10 |- style="background:#cfc; | 22 | November 30 | Cleveland | 128–95 | Kyrie Irving (29) | Aron Baynes (9) | Marcus Smart (7) | TD Garden18,624 | 12–10

|- style="background:#cfc | 23 | December 1 | @ Minnesota | 118–109 | Gordon Hayward (30) | Jayson Tatum (9) | Kyrie Irving (9) | Target Center17,663 | 13–10 |- style="background:#cfc | 24 | December 6 | New York | 128–100 | Kyrie Irving (22) | Al Horford (12) | Kyrie Irving (8) | TD Garden18,624 | 14–10 |- style="background:#cfc | 25 | December 8 | @ Chicago | 133–77 | Jaylen Brown (23) | Daniel Theis (10) | Gordon Hayward (6) | United Center20,923 | 15–10 |- style="background:#cfc | 26 | December 10 | New Orleans | 113–100 | Marcus Morris (31) | Robert Williams (11) | Terry Rozier (6) | TD Garden18,624 | 16–10 |- style="background:#cfc | 27 | December 12 | @ Washington | 130–125 (OT) | Kyrie Irving (38) | Jayson Tatum (12) | Kyrie Irving (7) | Capital One Arena20,409 | 17–10 |- style="background:#cfc | 28 | December 14 | Atlanta | 129–108 | Kyrie Irving (24) | Theis, Rozier (7) | Marcus Smart (7) | TD Garden18,624 | 18–10 |- style="background:#fcc | 29 | December 15 | @ Detroit | 104–113 | Kyrie Irving (24) | Irving, Tatum, Smart (8) | Kyrie Irving (4) | Little Caesars Arena14,500 | 18–11 |- style="background:#fcc | 30 | December 19 | Phoenix | 103–111 | Kyrie Irving (29) | Williams, Tatum (8) | Kyrie Irving (10) | TD Garden18,624 | 18–12 |- style="background:#fcc | 31 | December 21 | Milwaukee | 107–120 | Jayson Tatum (20) | Kyrie Irving (9) | Kyrie Irving (7) | TD Garden18,624 | 18–13 |- style="background:#cfc | 32 | December 23 | Charlotte | 119–103 | Kyrie Irving (25) | Marcus Morris (8) | Terry Rozier (6) | TD Garden18,624 | 19–13 |- style="background:#cfc | 33 | December 25 | Philadelphia | 121–114 (OT) | Kyrie Irving (40) | Irving, Tatum (10) | Al Horford (5) | TD Garden18,624 | 20–13 |- style="background:#fcc | 34 | December 27 | @ Houston | 113–127 | Kyrie Irving (23) | Morris, Hayward (6) | Kyrie Irving (11) | Toyota Center18,055 | 20–14 |- style="background:#cfc | 35 | December 29 | @ Memphis | 112–103 | Kyrie Irving (26) | Jayson Tatum (8) | Kyrie Irving (13) | FedExForum17,794 | 21–14 |- style="background:#fcc | 36 | December 31 | @ San Antonio | 111–120 | Jaylen Brown (30) | Jayson Tatum (11) | Kyrie Irving (8) | AT&T Center18,354 | 21–15

|- style="background:#cfc | 37 | January 2 | Minnesota | 115–102 | Gordon Hayward (35) | Horford, Brown (5) | Marcus Smart (8) | TD Garden18,624 | 22–15 |- style="background:#cfc | 38 | January 4 | Dallas | 114–93 | Jaylen Brown (21) | Daniel Theis (13) | Horford, Hayward (8) | TD Garden18,624 | 23–15 |- style="background:#cfc;" | 39 | January 7 | Brooklyn | 116–95 | Kyrie Irving (17) | Al Horford (9) | Marcus Smart (7) | TD Garden18,624 | 24–15 |- style="background:#cfc;" | 40 | January 9 | Indiana | 135–108 | Morris, Brown (22) | Marcus Morris (8) | Al Horford (8) | TD Garden18,624 | 25–15 |- style="background:#fcc; | 41 | January 10 | @ Miami | 99–115 | Kyrie Irving (22) | Morris, Rozier (6) | Kyrie Irving (5) | American Airlines Arena19,600 | 25–16 |- style="background:#fcc; | 42 | January 12 | @ Orlando | 103–105 | Kyrie Irving (25) | Al Horford (11) | Kyrie Irving (6) | Amway Center18,846 | 25–17 |- style="background:#fcc | 43 | January 14 | @ Brooklyn | 102–109 | Jayson Tatum (34) | Morris, Brown (6) | Terry Rozier (5) | Barclays Center16,247 | 25–18 |- style="background:#cfc | 44 | January 16 | Toronto | 117–108 | Kyrie Irving (27) | Jayson Tatum (10) | Kyrie Irving (18) | TD Garden18,624 | 26–18 |- style="background:#cfc | 45 | January 18 | Memphis | 122–116 | Kyrie Irving (38) | Aron Baynes (12) | Kyrie Irving (11) | TD Garden18,624 | 27–18 |- style="background:#cfc | 46 | January 19 | @ Atlanta | 113–105 | Kyrie Irving (32) | Al Horford (9) | Kyrie Irving (5) | State Farm Arena16,626 | 28–18 |- style="background:#cfc | 47 | January 21 | Miami | 107–99 | Kyrie Irving (26) | Al Horford (10) | Kyrie Irving (12) | TD Garden18,624 | 29–18 |- style="background:#cfc | 48 | January 23 | Cleveland | 123–103 | Terry Rozier (26) | Terry Rozier (8) | Terry Rozier (6) | TD Garden18,624 | 30–18 |- style="background:#fcc | 49 | January 26 | Golden State | 111–115 | Kyrie Irving (32) | Al Horford (10) | Kyrie Irving (13) | TD Garden18,624 | 30–19 |- style="background:#cfc | 50 | January 28 | Brooklyn | 112–104 | Brown, Smart (21) | Al Horford (11) | Smart, Rozier (7) | TD Garden18,624 | 31–19 |- style="background:#cfc | 51 | January 30 | Charlotte | 126–94 | Jaylen Brown (24) | Jaylen Brown (10) | Terry Rozier (10) | TD Garden18,624 | 32–19

|- style="background:#cfc | 52 | February 1 | @ New York | 113–99 | Kyrie Irving (23) | Kyrie Irving (10) | Irving, Rozier (6) | Madison Square Garden18,343 | 33–19 |- style="background:#cfc | 53 | February 3 | Oklahoma City | 134–129 | Kyrie Irving (30) | Morris, Tatum, Rozier (7) | Kyrie Irving (11) | TD Garden18,624 | 34–19 |- style="background:#cfc | 54 | February 5 | @ Cleveland | 103–96 | Jayson Tatum (25) | Brown, Tatum (7) | Al Horford (8) | Quicken Loans Arena19,432 | 35–19 |- style="background:#fcc | 55 | February 7 | L. A. Lakers | 128–129 | Kyrie Irving (24) | Jayson Tatum (10) | Kyrie Irving (8) | TD Garden18,624 | 35–20 |- style="background:#fcc | 56 | February 9 | L. A. Clippers | 112–123 | Gordon Hayward (19) | Jayson Tatum (8) | Smart, Horford (5) | TD Garden18,624 | 35–21 |- style="background:#cfc | 57 | February 12 | @ Philadelphia | 112–109 | Gordon Hayward (26) | Jayson Tatum (10) | Rozier, Horford (5) | Wells Fargo Center20,582 | 36–21 |- style="background:#cfc | 58 | February 13 | Detroit | 118–110 | Gordon Hayward (18) | Al Horford (14) | Hayward, Horford (8) | TD Garden18,624 | 37–21 |- align="center" | colspan="9" style="background:#bbcaff;" | All-Star Break |- style="background:#fcc | 59 | February 21 | @ Milwaukee | 97–98 | Kyrie Irving (22) | Al Horford (17) | Irving, Horford (8) | Fiserv Forum17,926 | 37–22 |- style="background:#fcc | 60 | February 23 | @ Chicago | 116–126 | Kyrie Irving (37) | Morris, Smart (6) | Kyrie Irving (10) | United Center21,295 | 37–23 |- style="background:#fcc | 61 | February 26 | @ Toronto | 95–118 | Marcus Morris (15) | Jaylen Brown (8) | Irving, Horford (5) | Scotiabank Arena19,800 | 37–24 |- style="background:#fcc | 62 | February 27 | Portland | 92–97 | Kyrie Irving (31) | Jaylen Brown (10) | Smart, Horford (5) | TD Garden18,624 | 37–25

|- style="background:#cfc | 63 | March 1 | Washington | 107–96 | Al Horford (18) | Marcus Morris (9) | Kyrie Irving (12) | TD Garden18,624 | 38–25 |- style="background:#fcc | 64 | March 3 | Houston | 104–115 | Kyrie Irving (24) | Kyrie Irving (9) | Irving, Smart (6) | TD Garden18,624 | 38–26 |- style="background:#cfc | 65 | March 5 | @ Golden State | 128–95 | Gordon Hayward (30) | Gordon Hayward (7) | Kyrie Irving (11) | Oracle Arena19,596 | 39–26