Sure that can happen, but if the guy is really throwing the ball well and commanding his pitches, I would rather take my chances with him going another inning than bringing in a new arm from the pen. That's just me.
Tonight, Alex Cobb was throwing a beauty against the Pirates. They didn't even get a hit against him until the 7th inning and Cobb got them 1-2-3 in the 8th inning and had 96 pitches. The Pirates were helpless all night long. Cobb had it on cruise control, but Cash managing to formula went to his closer to start the 9th. The Pirates hitters were no longer helpless against the closer and got a couple of doubles to tie the game. Colome is not Kimbrel. I thought it was a dumb move and turned off the game before Colome threw a pitch. So many dumb managers.