LHRR follow-up

I PR'd at this year's Litchfield Hills Road Race with a finishing time of 0:58:34. My previous PR was 1:00:05, set in 2003. Overall, I'm pleased with my performance, minus the slight cramp in my left calf muscle at approximately mile 6 that caused me to stop and stretch. This same cramp derailed me at last year's LHRR. Today's follow-up run was premature, as I found out ~15 minutes into it. I pulled my right hamstring on the eve of this year's LHRR, when I was doing my first ever speedwork session...seriously. Stupid or what? Well, that's what I felt ~15 minutes into today's run (3.1 miles; 0:25:49; 8:20).