James scored 37 points for Cleveland but could not break the shackles when it mattered most, and the Bucks — last in the Central Division — took a creditable victory over that division's top team.
One man who could not be stopped was Stephen Curry, who again led the way as Golden State won in overtime against Brooklyn to improve to 11-0.
Elsewhere, Blake Griffin sank a clutch late basket to cap a strong individual performance and give the Los Angeles Clippers victory over Detroit, while Washington beat Orlando for the 10th straight time.
Milwaukee's Bayless and Michael Carter-Williams scored 17 points for the Bucks while Giannis Antetokounmpo had 16 points and 11 rebounds in 45 minutes before fouling out with 3:15 left in the second overtime.
Bayless drew the assignment of guarding James after Antetokounmpo fouled out, and he held the Cleveland star scoreless the rest of the game.
Golden State's Curry scored 21 of his 34 points after halftime to steer the Warriors past Brooklyn 107-99.
Andre Iguodala hit a 3-pointer with six seconds left in regulation to tie the game, while Brook Lopez missed a short shot on the buzzer that would have won it for the Nets.
Iguodala finished with 18 points for the Warriors, who pulled quickly in overtime, scoring the first 10 points.
Jarrett Jack scored a season-high 28 for Brooklyn
Los Angeles' Griffin scored 34 points, including a crucial jumper with 17 seconds left that helped the Clippers down Detroit 101-96.
Jamal Crawford added a season-high 37 points, making all 10 of his free throws, for the Clippers, who were without injured starters Chris Paul and J.J. Redick.
Ersan Ilyasova scored 20 points for the Pistons, who have lost nine in a row against the Clippers.
Such a lopsided head-to-head record was outdone by Washington's domination of Orlando, extending the winning streak to double figures with a 108-99 victory.
Kris Humphries scored 23 points, including a career-high five 3-pointers. The last of them came with 4:45 remaining as part of an 8-0 runs that put the Wizards ahead.
Garrett Temple matched his career high with 18 points for Washington.
Nikola Vucevic had 19 points and 13 rebounds for the Magic.
Dallas overcame the absence of three regular starts, including talisman Dirk Nowitzki, and comfortably beat Texas rival Houston 110-98.
San Antonio won 92-83 to inflict a 10th straight loss to start the season for Philadelphia, which has lost 20 successive games dating back to last season.
Phoenix's Eric Bledsoe scored 30 points, and the Suns cruised to a 105-81 win over Denver.
source: philstar.com
