Trailing 44-41 with nine minutes left, Wallace started a 12-0 run with a thunderous dunk following a steal by Ivan Rabb and later added a pair of fast-break layups.
Jayley Brown added 11 points and seven rebounds while Mathews had 12 points for the Golden Bears (5-2), who bounced back after falling out of the Top 25 following back-to-back losses to San Diego State and Richmond last week.
Wallace added 11 rebounds and eight assists for California, which shot 40 percent from the field, including 6 of 21 from beyond the arc.
California settled for mid-range jumpers early and missed 14 of its first 19 shots while Seattle opened the game just 5 of 17.
Brown missed five of his first six shots after scoring a season-high 27 points in the loss to Richmond.
Chris Brown has canceled plans for a Down Under tour after Australian authorities earlier warned the troubled R&B singer that they were likely to refuse him a visa because of his criminal conviction for assaulting pop star Rihanna.
 Period_4, Detroit, Miller 1 (Abdelkader, Glendening), 4:21.
Penalties_Detroit bench, served by Pulkkinen (too many men), 1:30; Kane, Buf (slashing), 1:41; DeKeyser, Det (tripping), 5:59; Kane, Buf (roughing), 17:04; Zetterberg, Det (roughing), 17:04; Smith, Det (roughing), 17:04; Gorges, Buf, major (fighting), 19:04; Abdelkader, Det, served by Pulkkinen, minor-major (hooking, fighting), 19:04.
 Period_6, Buffalo, Kane 4 (Gionta, McGinn), :53 (pp).
Power-play opportunities_Buffalo 2 of 5; Detroit 1 of 2.
Hearings began Wednesday in a legal battle between the Japanese government and local officials in Okinawa over plans to move a U. S. military air base on the southern island.
The central government filed a lawsuit seeking to overturn Okinawa Gov. Takeshi Onaga's cancellation of an earlier local approval for land reclamation needed for the base's relocation.
The Eagles led 79-68 before Tim Derksen scored five points, sparking a 9-1 surge to pull the Dons to 80-77 with 50 seconds remaining.
The Dons' Mladen Djordjevic missed a 3-point attempt, and Dont'e Reynolds missed the tip in with 16 seconds left.