Rounds 1 through 3 saw Melendez generating more offense and negating most of Thomson's salvos and tactics. The fourth round saw Thomson finally capitalize on a trip and take Melendez's back to threaten a rear naked choke for some time. The fifth round again saw Thomson stay more active and take the round.
Score card controversies could arise over how to score the fourth (10-9 or 10-8, Thomson) or how to score the first round (10-9 Melendez or 10-10).
Melendez moves to 21-2 and has now capped off the trilogy with Thomson with a 2-1 advantage - although with some controversy. His lone other setback was a decision loss to Mitsuhiro Ishida back in 2007 and Melendez avenged that with a third round KO back in 2009. At this point, Melendez has very few Strikeforce-based challengers left in his division.
Thomson drops to 19-5-1 for his career and probably has to be raring for a rare MMA quadrilogy to show that he can indeed beat Gilbert and take that belt for himself.