Los Angeles Angels pitcher Tommy Hanson was placed on the 15-day disabled list Thursday with a right forearm injury.
The right-hander was scratched from his Wednesday start after he felt tightness. He has posted a 5.10 ERA in 47 2/3 innings this season, spanning nine starts. He was acquired over the winter from the Atlanta Braves for reliever Jordan Walden.
It is uncertain how much time he will miss. He was scheduled to have an MRI in Detroit later on Thursday. The team called up lefty Michael Roth from Double-A Arkansas to work out of the bullpen.