If you end up with Vincent Jackson, Wes Welker or Reggie Wayne on any of your teams, you might want to trade them before their second-half swoon. They've shown a tendency to start fast, then fade.
Look at how they've performed in the season's first half (Games 1-8) compared to the second half (Games 9-16):
Reggie Wayne, Colts
Age: 35
First half: 101 games, 541 catches, 859 targets, 7,480 yards, 74.1 ypg, 44 TDs
Second half: 95 games, 465 catches, 739 targets, 6,086 yards, 64.1 ypg, 36 TDs
Wes Welker, Broncos
Age: 33
First half: 77 games, 445 catches, 615 targets, 4,963 yards, 70.9 ypg, 32 TDs
Second half: 76 games, 396 catches, 575 targets, 4,395 yards, 64.6 ypg, 16 TDs
Vincent Jackson, Buccaneers
Age: 31
First half: 57 games, 207 catches, 398 targets, 3631 yards, 64.8 ypg, 31 TDs
Second half: 66 games, 215 catches, 399 targets, 3,731 yards, 56.5 ypg, 21 TDs