Stairs against lefties the past 3 years:
84 AB, .176, 2 HR, 6 R, 12 RBI
The Hamster is not going to play every day because he can't hit lefties. If he did play every day and faced lefties on any sort of regular basis, he would kill your BA. If you're in a deep league with daily transactions, it might not be a bad idea to keep him around just to use against righties. But in most leagues, leave him alone.