IMO the comp. is on his own Team.
Petro signed when he was 30, Thodore will be 30 next August.
Petro signed for 7 years at 8.8, which at the time, was 10.80% of the cap, per Puckpedia.
Since Petro signed
Petro Points per game .60 Theodore in the span .77
Theo +52, Petro +39
Petro plays about 2 minutes more a game then Theo over the past 4+ seasons, however they both have played a similar amount of time on the PP and at even strength. Petro has logged more minutes on the PK.
I think he gets at least 7X9.