Angels' Hanson scratched from start against Tigers
The right-hander was scratched after feeling tightness in his right forearm while warming up in the bullpen.
''He's going to be evaluated and have some tests done tomorrow and we'll see what's going on,'' Angels manager Mike Scioscia said after Los Angeles beat Detroit 7-4 on Wednesday night.
Hanson is 4-2 with a 5.10 earned-run average.
Right-handed reliever Billy Buckner started in Hanson's place and allowed three runs and seven hits in three-plus innings.