CLEVELAND — Indians closer Joe Borowski, last year's American League saves leader, was designated for assignment today.

The right-hander blew his fourth save in 10 chances on Wednesday against the Chicago White Sox, and was 1-3 with a 7.56 ERA in 18 games this season.

Borowski had 45 saves last season but has struggled since returning from an arm injury. He returned to the Indians in late May after being sidelined for about a month with a strained right triceps that caused him to lose velocity on his pitches.

In other roster moves, the Indians called up right-handers Jensen Lewis and Brian Slocum from Triple-A Buffalo.

Lewis has split the season with Buffalo and Cleveland. At Buffalo he was 1-2 with one save and a 3.60 ERA in 11 relief appearances. Slocum, who has been converted to a reliever, has one save and a 0.69 ERA in seven outings.

The Indians also designated right-hander Rick Bauer for assignment. He had a 13.50 ERA in four relief appearances.