There is such a thing, he wasn't playing w/ pressure to win for his team. let's look at his time in Carolina and Miami:
2009: Carolina is out of contention, Moore comes in late in the year and leads Carolina to 4-1 record. 79-126, 990 yds, 8 TDs, 0 INTs, 108 rating. Led O to 24.4 PPG
2010: starter week 1, led team to 1-4 record in games he started. 74-133, 822 yds, 5 TDs, 10 INTs, 55.4 rating. Led O to 14 PPG(did not include No game he left early in)
**left NO game early, team was trailing 7-3 when he left
2011 Miami: took over w/ team at 0-3. didn't start at SD but came in w/ game tied at zero. led team to 0-4 losses in that game plus first 3 starts. #s in those 4 games: 68-115, 706 yds, 1 TD, 4 INTs, 65.3 rating. led O to 13.5 PPG
final 9 games w/ team out of it. led team to 6-3 record. 118-192, 1414 yds, 10 TDs, 5 INTs, 90.4 rating.