Justin Morneau’s concussion symptoms are back:

Morneau jammed his left shoulder Sunday diving for a ball against the Detroit Tigers. The team said Tuesday he started experiencing headaches Monday and he was given a concussion test.

The team said he displayed “mild” symptoms during one part of the test, so it was decided to play it safe with a player who missed the second half of last season with a concussion.

I believe the test is to ask if the player sees stars. If he sees tweeting birds, he’s in trouble.