Aldridge led six players in double figures for the Trail Blazers (28-9), including guard Wesley Matthews with 18 points and forward Nicolas Batum with 16. Center Robin Lopez collected 15 points and 13 rebounds and guard Damian Lillard scored 15 points with six assists for the winners.
Bradley scored 13 points on 6-for-8 shooting as Boston, which led through the entire first half, took a 60-58 advantage at intermission. The Celtics shot .619 (26 for 42) in the half. Lillard had 13 points and Aldridge 11 for the Blazers at the break.
PORTLAND got its first lead at 69-68 on a 3-pointer by Mathews with 7:30 left in the third quarter, part of a 11-0 run that gave the Blazers a 75-68 lead. Soon it was 79-70, but the Celtics closed the margin to 90-86 after three quarters.
Boston was still within 96-91 when the Blazers scored eight straight points to go in front 104-91. The Celtics cut the edge 110-104 and had possession with 40 seconds left, but could get no closer.
The Celtics got out to a 12-6 lead early and extended it to 32-22 behind Bradley and center Kris Humphries, who combined for 21 points in the first quarter. The second of back-to-back 3-pointers by rookie guard C.J. McCollum got PORTLAND within 32-27 heading into the second quarter.
Boston increased its advantage 47-38 midway through the period, but the Blazers rallied to tie it at 54-54 with 1:30 left before the half.
NOTES: Boston is the only team to have a winning record against the Blazers in PORTLAND. The Celtics are 27-24 over the years playing at Memorial Coliseum and the Moda Center. ... PORTLAND F LaMarcus Aldridge moved into the top 10 on the franchise career list in most statistical categories, including scoring (fourth), rebounds (fifth) and blocked shots (seventh). With 10,151 career points, he is 254 short of No. 3 Cliff Robinson. ... Boston coach Brad Stevens expected his players to have an attitude Saturday as they tried to end a seven-game losing streak on the final stop of a five-game road trip. "The guys should be chippy and ready," he said. "That's what you should feel like. Sometimes when you're going through tough times, you don't always perform the way you should. Luckily, these guys have done that the last two games (a 111-105 loss to the L.A. Clippers and a 99-97 defeat to Golden State). ... "Stevens said point guard Rajon Rondo, who has missed the entire season while rehabbing from knee surgery, is "probably a couple of weeks" away from his return. "He can do everything (in practice) now," Stevens said. "It's a matter of when he feels it's best" to come back.