Lee County, FL (My Sportsbook) - The Minnesota Twins have placed catcher Joe Mauer, as well as pitchers Scott Baker and Boof Bonser, on the 15-day disabled list.

Additionally, the club announced that Francisco Liriano will start Minnesota's home opener Monday against Seattle.

Mauer is still dealing with inflammation in the sacroiliac joint, which was diagnosed in early March through a magnetic resonance arthrogram. At the point of that examination, he had been experiencing back pain for over two months, further limiting the two-time All-Star following surgery to remove a kidney obstruction this offseason.

Mauer has not appeared in a game this spring, though his condition has improved since switching medication to reduce the inflammation. However, he is still focusing on strength and conditioning, and is planning to ease back into baseball activities.

There is no timetable for Mauer's return, and his absence is a blow for the Twins' lineup, as he led the club in batting (.328) and on-base percentage (.413) last season. Mauer, a two-time AL batting champ who will turn 26 on April 19, also hit nine home runs and drove in 85 runs last season.

Baker was placed on the disabled list, retroactive to March 28, because of stiffness in his right shoulder. He is eligible to come off the DL on April 12.

Baker, 27, went 11-4 in 28 starts last season for the Twins, posting a 3.45 earned run average. He also struck out 141 and walked 42 in 172 1/3 innings.

Bonser had surgery on his right shoulder in late February to repair a torn labrum and rotator cuff, and was estimated then to miss six to eight months.