It was the fourth OT game in a row for the Bruins, who pulled ahead of the Lightning for sole possession of the Atlantic Division lead by earning a point.
Di Giuseppe had a wide-open net when Boston goalie Tuukka Rask couldn't corral the rebound on Jeff Skinner's breakaway.
The officials reviewed the play for a few minutes before ruling there was no interference when Skinner made contact with Rask outside the crease.
Elias Lindholm and Nathan Gerbe also scored for Carolina and Cam Ward stopped 30 shots. Riley Nash had two assists for Carolina.
Loui Eriksson and David Pastrnak scored for Boston, which hasn't lost in regulation since Feb. 28.
Game highlights: Jaromir Jagr scored two goals and Vincent Trocheck had a goal and three assists to lead the host Panthers to a 6-2 victory over the Senators. Jagr became the fifth player in NHL history to have at least 50 points in 20 NHL seasons, joining Ron Francis, Gordie Howe, Ray Bourque and Mark Messier. … Justin Abdelkader scored the tiebreaking goal late in the third period to lift the host Red Wings to a 3-2 victory over the Jets.
No discipline for Kucherov hit: Bruins defenseman John-Michael Liles won't be disciplined for his hit on Lightning forward Nikita Kucherov, the league said after a hearing. It didn't give a reason for its decision.
The hit occurred at 17:30 of the first period of Tuesday's game at Amalie Arena. No penalty was assessed. Kucherov stayed on the ice while a trainer went out to help him. He did not play the rest of the first period but returned for the second and played the rest of the game.
In announcing the hearing, the league said it was considering supplemental discipline for an illegal check to the head.
Around the league: Avalanche captain Gabriel Landeskog was suspended for three games for a cross-check on Ducks defenseman Simon Despres in the Avalanche's 3-0 win Wednesday night. The wing is considered a repeat offender by the league's Player Safety Department after being suspended for two games in November because of an illegal check to the head of Boston's Brand Marchand. … Oilers defenseman Darnell Nurse was suspended for three games for being the aggressor in a fight with the Sharks' Roman Polak on Tuesday.
First Period—1, Carolina, Lindholm 9 (Hanifin, Nash), 5:06 (pp). Penalties—Bergeron, Bos (high-sticking), 3:09; Bergeron, Bos (hooking), 17:15.
Second Period—2, Boston, Eriksson 25 (Bergeron, Krug), 5:13 (pp). 3, Carolina, Gerbe 3 (Terry, Nash), 8:34. Penalties—Lindholm, Car (holding), :37; Terry, Car (slashing), 4:40.
Third Period—4, Boston, Pastrnak 10 (Krejci), 5:54. Penalties—Krug, Bos (hooking), 9:28.
Overtime—5, Carolina, Di Giuseppe 5 (Skinner, Hanifin), 1:30. Penalties—None. Shots on Goal—Carolina 5-10-10-3—28. Boston 8-16-8-0—32. Power-play opportunities—Carolina 1 of 3; Boston 1 of 2. Goalies—Carolina, Ward 20-15-7 (32 shots-30 saves). Boston, T.Rask 27-18-7 (28-25).
First Period—1, Florida, Jagr 22 (Huberdeau, Campbell), 13:07. 2, Ottawa, Z.Smith 20 (Ryan, Karlsson), 19:37. Penalties—None.
Second Period—3, Florida, Jokinen 13 (Gudbranson, Trocheck), 5:52. 4, Ottawa, Karlsson 12 (Z.Smith, Stone), 6:29. 5, Florida, Ekblad 14 (Trocheck, Jokinen), 9:32. 6, Florida, Huberdeau 12, 9:46. Penalties—Karlsson, Ott (slashing), 3:49; Huberdeau, Fla (slashing), 3:49; Huberdeau, Fla (hooking), 10:40; Wilson, Fla (high-sticking), 15:03.
Third Period—7, Florida, Jagr 23 (Trocheck), 4:26. 8, Florida, Trocheck 20 (R.Smith), 10:59. Penalties—Karlsson, Ott (slashing), 5:45; Hoffman, Ott (tripping), 15:01. Shots on Goal—Ottawa 9-11-8—28. Florida 10-15-6—31. Power-play opportunities—Ottawa 0 of 2; Florida 0 of 2. Goalies—Ottawa, Anderson 27-21-4 (31 shots-25 saves). Florida, Luongo 28-16-6 (28-26).
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First Period—1, Winnipeg, Dano 2 (Perreault, Burmistrov), 11:23. 2, Winnipeg, Myers 8 (Scheifele), 16:31. Penalties—Wheeler, Wpg (cross-checking), 3:19; Scheifele, Wpg (holding), 6:02; Ericsson, Det (hooking), 9:11; Thorburn, Wpg (slashing), 15:19; Glendening, Det (slashing), 15:19.
Second Period—3, Detroit, Larkin 20 (Abdelkader, Zetterberg), 6:40. 4, Detroit, Ericsson 3 (Kronwall, Helm), 12:25. Penalties—Nyquist, Det (holding), 2:13; Thorburn, Wpg (roughing), 9:27; Abdelkader, Det (roughing), 9:27.
Third Period—5, Detroit, Abdelkader 17 (Tatar), 15:24. Penalties—Kronwall, Det (tripping), 4:16; Thorburn, Wpg (holding), 10:09; Lowry, Wpg, misconduct, 17:31; Zetterberg, Det (slashing), 18:15. Shots on Goal—Winnipeg 10-6-9—25. Detroit 12-13-10—35. Power-play opportunities—Winnipeg 0 of 4; Detroit 0 of 3. Goalies—Winnipeg, Hutchinson 7-13-2 (35 shots-32 saves). Detroit, Mrazek 25-13-6 (25-23).