A line drive off the bat of Kansas City Royals first baseman Eric Hosmer hit Cobb on the head Saturday, and the starter left the game on a stretcher. Fortunately, Cobb was only treated for a "mild concussion" and cauliflower ear, and all of his tests came back normal.
Cobb will not travel with the Rays on their upcoming seven-game road trip, and will need to pass concussion tests before he can resume throwing.
The right-handed pitcher had started the season strong for Tampa Bay, posting a 3.01 ERA in his first 13 starts of the season. The team recalled Josh Lueke to take Cobb's roster spot, but will need to recall a starting pitcher to replace Cobb in the rotation later in the week.
Alex Colome is the likely candidate to replace Cobb in the rotation. The 24-year-old made one start for the Rays earlier this season, allowing one run on five hits over 5 2/3 innings against the Miami Marlins.