Here's the innings per start data for Lannan's 2011 season:
Innings Count
2 1
2 1/3 1
3 1
3 1/3 1
5 5
5 1/3 2
5 2/3 5 <---- 16 starts where he couldn't complete the 6th inning
6 7 <---- 17 starts where he completed at least the 6th inning
6 1/3 3
6 2/3 2
7 4
7 2/3 1
'11 Times Throu Order PA BA OBP SLG
1st PA in G, as SP 310 .227 .310 .366
2nd PA in G, as SP 285 .323 .396 .407
3rd PA in G, as SP 206 .263 .332 .387
4th+ PA in G, as SP 7 .429 .429 .714
