Angels placed RHP Garrett Richards on the 60-day disabled list with a torn left patellar tendon.
Garrett Richards suffered a left knee patellar injury in Wednesday's game.
Garrett Richards left Wednesday's start against the Red Sox with a potentially serious right knee injury.
Garrett Richards picked up his 13th victory of the season on Friday, limiting the Rangers to just two runs on seven hits over 7 1/3 innings.
Garrett Richards took a no-hitter into the seventh Saturday, only to end up allowing three runs -- one earned -- in 6 1/3 innings against the Red Sox.
Garrett Richards struck out nine while tossing a five-hit shutout Monday against the Dodgers.
Garrett Richards fell to 11-4 after allowing four runs over seven innings in Wednesday's loss to the Orioles.
Garrett Richards surrendered four runs on seven hits and two walks while striking out five in Thursday's setback against the Tigers.
Angels general manager Jerry Dipoto said Monday that the club has no plans to temporarily shut down Garrett Richards in order to limit his workload.
Garrett Richards limited the Mariners to one run and three hits in eight innings on Saturday.
Garrett Richards was brilliant yet again Friday, striking out eight batters over seven scoreless innings in a 3-0 victory over the Rangers.
Garrett Richards struck out 11 while allowing one run over 7 1/3 innings in Sunday's 6-1 win over the Astros.
Garrett Richards allowed three runs on just two hits and two walks while striking out nine in Tuesday's 8-4 win over the White Sox.
Monday's game between the Angels and White Sox has been postponed due to rain.