Top 5: ERA and Runs

Top 5 in Runs and ERA by month (2010)
April - Rays: #1 R (144), #2 ERA (3.13) 17-6
June - Rangers: #1 R, #2 ERA (3.40) 21-6
July - Giants: #2 R (149), #5 ERA (3.41) 20-8
July - White Sox: # 5 R (140), #1 ERA (2.94) 18-8
August - Reds: # 5 R (90) , #3 ERA (2.96) 13-4