OAKLAND -- What was known days ago was made official Saturday, with Bartolo Colon hitting the disabled list and Tyson Ross not only taking his roster spot but his slot in the rotation for the day's contest against the Giants.
Colon, sidelined by a right oblique injury, pitched just two innings in his last start Sunday against San Diego before exiting. He played catch as recently as Thursday, and manager Bob Melvin said this week there is a possibility the veteran -- eligible to be reinstated July 3 -- could return before the All-Star break.
This marks Ross' third stint of the season with the A's, having last joined them just a week ago in Brandon McCarthy's stead for a start against the Padres, who collected just two runs on one hit in Ross' six innings on the mound.
Ross entered the day 2-6 with a 6.11 ERA in 10 starts with Oakland, where he's struggled with command, compared to a 2-1 ledger and 2.45 ERA in four starts in Sacramento.