Milwaukee, which led 59-50 at halftime, hit its first four shots of the third quarter, including another 3-pointer by Ilyasova and Jennings' first basket of the game. That led to a quick timeout by Scott, but lead reached 79-59 midway through the period before the Cavaliers cut the margin to 90-81 by the end of the period thanks mostly to Irving, who hit 5 of 6 from the field.
The Cavaliers trimmed the lead to 90-87 early in the fourth quarter and outscored the Bucks 32-18 in the period. Scott went with a combination of Luke Walton, Gibson, Livingston, Speights and Ellington for most of the quarter.
"It's pretty simple," Scott said. "I told my guys to thank the second unit. They won the game for us."
"We started aggressively, but we kind of gave up the game," Ilyasova said. "Their second unit hustled and we gave up a lot of easy buckets."
Tristan Thompson scored 18 points and Dion Waiters added 16 for the Cavaliers. Livingston scored 12 points. Speights had 10 points and had six rebounds in 18 minutes.
Jennings, who was left off the Eastern Conference All-Star team by coaches picking the reserves, scored 14 points for the Bucks, but was 5 of 19 from the field and was scoreless in the first half. He finished with 12 assists. Sanders had 14 points and 11 rebounds.
The Bucks are 6-3 under Boylan, who replaced Scott Skiles on Jan. 8.
Trailing 31-30 early in the second quarter, Ilyasova hit three 3-pointers in 1:29 to help the Bucks build a 41-33 lead. The margin reached 11 points and the Bucks were ahead 59-50 at halftime. Milwaukee scored 38 points in the quarter — a season high for any period this season — and hit 15 of 24 from the field.
NOTES: Milwaukee hasn't had a player in the All-Star Game since 2004 when Michael Redd made the team. ... The Bucks host Golden State on Saturday night. ... Milwaukee is 17-10 against Eastern Conference teams. ... .. Cleveland G C.J. Miles, who had been battling the flu, dressed, but didn't play. ... Cleveland is 2-9 against the Central Division. ... The Cavaliers play at Toronto on Saturday.