He wants them erased.
Oswalt's feelings extend to other proven steroids users as well.""A-Rod's numbers shouldn't count for anything," Oswalt said in a phone interview with MLB.com. "I feel like he cheated me out of the game."
"The ones that have come out and admitted it, and are proven guilty, [their numbers] should not count. I've been cheated out of the game," Oswalt continued. "This is my ninth year, and I've done nothing to enhance my performance, other than work my butt off to get guys out. These guys [who took PEDs] have all the talent in the world. All-Star talent. And they put times two on it."I'm going out there with the ability God gave me. They have that ability, too, and they're putting something on top of it."
On the surface this seems like a good idea, but the devil is in the details. What about players like Roger Clemens, who is surrounded by a cloud of suspicion but has never been proved to have taken banned substances? And how about the players who cheated but somehow escaped detection? How the 103 names on the list along side A-Rod?
Oswalt would erase A-Rod's numbers (MLB.com)

I wonder if Oswalt felt cheated out of the game when Clemens and Pettite led him to the World Series a few years ago.