Over the last two seasons, Keller has put up great numbers in the first few weeks of the season only to fade into mediocrity down the stretch. In 2010, he averaged 4.7 catches for 63.5 yards and scored five touchdowns in his first four games. He would go on to average three catches for 36.1 yards with no touchdowns the remainder of the season. Keller was also hot to start 2011, averaging 4.5 catches for 65.2 yards with two touchdowns. During the next 12 contests, he averaged 3.9 catches, 46.2 yards and scored three times. It's that inconsistency that makes Keller tough to trust as a regular fantasy starter, so don't take him before the latter rounds.