"A magnetic resonance imaging exam on Jim Thome's sore left quadriceps revealed the pain is related to a previous back injury, Minnesota Twins athletic trainer Rick McWane said this afternoon. Thome is scheduled to have an epidural on Friday.

"If that works, we'll progress his baseball activities this weekend," McWane said.

Thome has been on the disabled list since June 2, and hasn't played since May 31 at Detroit.

In other injury news:

- Justin Morneau's left wrist is bothering him enough that the team had an MRI taken, revealing excess fluid. "No structural damage, so we will continue to let him play as tolerated," McWane said. Morneau is in tonight's lineup as the designated hitter. "