The 2001 MLB season is already 6 weeks old and there are still some relievers sporting sparkling 0.00 ERA's. The following is a list of said pitchers that have tossed a minimum of 10 innings this year.
Zero ERA Club
Pedro Beato/NYM - 17 IP, 10 G (on DL)
Sergio Santos/CHW - 15 IP, 12 G
Daniel McCutchen/PIT - 14 IP, 11 G
Brad Ziegler/OAK - 10 IP, 13 G
Lefty specialists Joe Patterson/ARI and Doug Slaten/WSH have appeared in 14 games apiece, but have not accumulated enough innings to qualify.
Aaron Crow/KCR, Rafael Perez/CLE, and Mike Dunn/FLA all gave up an earned run this past week.