According to Reds.com, Kent Mercker has gone on the 15-day disabled list with elbow inflammation:

The injury is officially listed as left elbow inflammation, and it was enough to force Mercker onto the 15-day disabled list on Sunday. Right-hander Mike Burns was recalled from Triple-A Louisville, and was expected to arrive some time during the game against Philadelphia.

You might remember that Burns started the season in Cincinnati, but was sent down on April 19. You probably don't remember that Michael Gosling took his place on the roster because he was optioned back to Louisville a few hours later to make room for Brian Shackelford. It's not really relevant, I suppose; I just think it's funny.

I hope that Burns is feeling better after his month in Louisville. He left the team with a 7.56 ERA in seven appearances. In Louisville, he sports a 1.84 ERA in nine appearances.