Alex Cobb

The 37-year-old hurler continues to work his way back from a right hip impingement that shelved him early in spring training. He's expected to throw his first bullpen session this week and could be ready to rejoin the Tigers' rotation before the end of April.

The Tigers placed Cobb (hip) on the 15-day injured list Thursday.

Cobb will open the regular season on the injured list with a right hip impingement. The 37-year-old veteran should be ready to rejoin Detroit's rotation by late April, but he's going to need several weeks to fully ramp up before his season debut.

Cobb (hip) threw a bullpen session Saturday and is slated to throw another one Wednesday, Evan Petzold of the Detroit Free Press reports.