I don't think it was done on purpose but it seems to me that McCline laid a big apey shoulder square into Peter's face at the close of round two, knocking Sam off balance and causing him to slip on the paint just as Jameel McCline's body shot came in.

This chain of events caused the Sam Peter meltdown in round 3

FYI

I scored
Round 2 10-9 McCline
Round 3 10-7 McCline

Round 1 and Rounds 4-12 I gave to Peter 10-9