It is a statistical inevitability that Cliff Lee will get in trouble in either the 6th or 7th inning and have to be pulled out of the game, yet Wedge will usually let things get pretty ugly before giving him the hook. Actually, he pretty much does this with every pitcher. I understand that the bullpen has not been stellar this year, but you have to play all the cards you have. I cannot count how many times I have seen him leave a pitcher in the game long after the pitcher has "lost it."
In responding let me start with some general observations. There seems to me to be at least five major reasons to remove a starting pitcher from a game (1) injury; (2) going beyond a
certain pitch count (when a pitcher goes beyond a certain number of pitches he is more prone to lose his mechanics thereby increasing risk of injury; There is also some evidence that a pitcher exceeding a certain individual pitch count is not as effective in his next few starts); (3) lack of effectiveness; (4) actual loss of mechanics from being tired (this is a decision made by the manager based on input from the catcher and his pitching coach); and (5) late in the game for matchup purposes.
Obviously, starters should always be pulled when injured, starts to get beyond the designated pitch count or begin to lose their mechanics due to being tried. Whether pulling a pitcher for
the other two reasons, however, does require some judgment. One factor you mentioned is the quality of the bullpen but even with a usually reliable bullpen there are often reasons not to go
to the bullpen. The bullpen might be tried. The bullpen might be reasonably rested but the next game's starter might be pitching poorly and an effort must be made to save the bullpen as much as possible for fear that it will have to be used extensively the next day. The score is also important. If the team is up or down a bunch of runs keeping the starter in awhile longer is a prudent decision for trying to achieve long-term success.
A manager has to try to be satisfied if his number five starter can routinely give him five good innings but less than a routine six for starters one-three is just not acceptable. No bullpen can regularly handle multiple starting pitchers going less than six full innings. Part of the reason for the Tribe's bullpen success was due to four starters averaging more than 6 innings per start and I believe Elarton was just below that threshold.
Some pitchers stuff just is not good enough to allow them to get successfully through the order more than twice. Others have good enough stuff but either lose concentration as the game goes on or have not learned how to pitch when facing the order a third or fourth time. Leaving them in games, particularly when up or down a bunch of runs, gives them experience in dealing with concentration problems and facing the order three and four times. In my opinion routinely
taking out a pitcher who has been effective in the fifth makes no sense whatsoever unless he fails a large part of the time to be ineffective after the fifth at it is an important game or that the pitcher has demonstrated to the satisfaction of the manager and pitching coach that he is not capable of going beyond five innings.
This brings us to Mr. Lee. By my count he has started the sixth inning nineteen times this season:.
4/5 - 5.0 innings, 3 ERs, 1 in the 4th and 2 in the 6th:
4/11 - 6.0 innings, 2ERs, 2 in the 6th;
4/16 - 7.1 innings, 1 ER, 1 in the 4th (6th and 7th no runs);
4/26 - 6.0 innings, 1 ER, 1 in the 4th (no runs in 6th);
5/6 - 6.2 innings, 4 ERs, 3 in the 4th, 1 in the 7th (no runs in the 6th);
5/12 - 7.0 innings, 5 ERs, 1 in the 2nd, 1 in the 5th, 3 in 7th (no runs in the 6th)
5/18 - 6.0 innings, 4 ERs, 1 in 1st (unearned), 1 in 2nd, 3 in 7th (no runs in the 6th);
6/3 - 7.0 innings, 2 ERs, 2 in 6th (no runs in 7th);
6/9 - 7.2 innings, 4 ERs, 2 in 1st, 1 in 6th, 2 in 8th (no runs in 7th);
6/15 - 6.2 innings, 3 ERs, 1 in 4th, 2 in 7th (no runs in 6th);
6/20 - 7.2 innings, 1 in second (unearned), 1 in 6th (no runs in 7th);
6/26 - 6.0 innings, 2 ERs, 1 in 3rd, 1 in 4th (no runs in 6th);
7/1 - 6.0 innings, 4 ERs, 3 in 4th, 1 in 5th (no runs in 6th);
7/6 - 6.0 innings, 4 ERs, 3 in 5th (1 unearned), 2 in 6th;
7/13 - 5.2 innings, 2 ERs, 3 in 6th (1 unearned);
7/18 - 5.0 innings, 6 ERs, 5 in 4th, 1 in 6th;
7/30 - 7.2 innings, 3 ERs, 1 in 2nd, 1 in 3rd, 1 in 4th (no runs in 6th or 7th);
8/4 - 6.1 innings, 4 ERs, 2 in 6th, 2 in 7th;
8/10 - 7.0, 2 ERs, 2 in 4th (no runs in 6th and 7th).
I didn't examine the scores of the 6th, 7th innings and 8th innings which Lee was permitted to start nor how many inherited runners were permitted to score (nor how many inherited runners the bullpen prevented from scoring) because I did not find it necessary based on the data that I did look at. To me the data does not establish "a statistical inevitability that Cliff Lee will get in trouble in either the 6th or 7th inning and have to be pulled out of the game, yet Wedge will usually let things get pretty ugly before giving him the hook." Without further analysis it appears to me that Wedge based on my introductory discussion and the above data has been pretty reasonable in his use of Lee beyond the fifth.