Grubbs only has 78 pitches after 5 innings of work. He just put down the best of their lineup, so I figure Grubbs is certainly good for 1 more inning, and probably 2 innings.
I like Lummus, but I think Grubbs had one more good inning. The last 3 innings, Grubbs was really putting them down. He had 90 pitches under his belt. He could have gone 100-105 without problems.