He hadn't gone past 7 innings before this season. In back to back starts with PHI he went 8 and 9, throwing 101 and 124 pitches.
I know you have a shiny new toy and are trying to get into the playoffs, but the guy had a 7-0 lead. No matter how much you hate your pen, you have to think about the next 2 months with him. He's already at a career innings high for a season.
Maybe it works out? It's a gamble though for a guy in his 30's though.