PORTLAND, Ore. -- Trail Blazers guard Brandon Roy will miss four games because of a right hamstring injury, the team said Friday.
Roy re-injured the hamstring late in the first half of Portland's 98-90 victory at Philadelphia on Wednesday night. He left the team for treatment in Seattle.
Jerryd Bayless started in place of Roy on Friday night against the Celtics, but he left in the third quarter with a sprained left ankle; the team said he would not return.
Roy, a two-time All-Star, was originally hurt during the third quarter of the Blazers' 120-108 home win over the Milwaukee Bucks on Jan. 13.
In his fourth NBA season, Roy is averaging 23.1 points, 4.6 rebounds and five assists. The Blazers say he will be reevaluated next Thursday.
Roy is having his hamstring treated by doctors for the NFL's Seattle Seahawks. Microsoft co-founder Paul Allen owns the Blazers and the Seahawks.
The Blazers visit the Celtics on Friday night before playing at Detroit on Saturday.
Recently, Portland saw the return of forward Rudy Fernandez, who missed 19 games because of a back problem.
Forward Nicolas Batum, who was supposed to start but had shoulder surgery just before the start of the season, could return as early as Monday's game against the Hornets at the Rose Garden.
The Blazers, who made the playoffs last season for the first time since 2003, have gone 26-17 despite the injuries, matching their pace last season when they won 54 games. Portland was 2½ games back of Denver in the Northwest Division going into Friday night's game.