Isn't the rule that a starting pitcher can't be taken out unless he's given up 4 runs or pitched four innings? Look Below at Rick Helling. 3 inning, no hits, no runs! He was taken out.

River City ip h r er bb so bf era
Helling 3.1 0 0 0 0 1 10 3.21
Wasdin W,6-4 1.2 1 1 1 0 0 6 2.83
Sherrill 1.2 0 0 0 0 1 5 2.89
Speier 0.2 2 0 0 0 0 5 3.29
Wood 0.1 0 0 0 0 1 1 3.66
Seanez S,4 1.1 1 0 0 1 2 6 3.43

Maybe it's just making it INTO the 4th inning?