Robert Jonathan Mosebach (born September 14, 1984) is a Major League Baseball relief pitcher.
Mosebach made his major league debut against the Minnesota Twins on July 25, 2009, at Angel Stadium of Anaheim, pitching one inning and giving up two hits. However, he was optioned to the Triple-A Salt Lake Bees just five days later. He elected for free agency at the end of the 2010 season.
On March 2, 2016, Mosebach signed with the Wichita Wingnuts of the American Association of Independent Professional Baseball.