Heap or Olsen for bye week filler?

[hwzdavu]

Would you guys rather pick up Heap or Olsen for a bye week filler and possibly longer? I have Davis on a bye week, but he is also hurt. I would pick up his backup, but I need a TE for this week.

Heap vs Mia
Olsen vs Buf

QB: Matt Schaub
RB: Frank Gore, Ryan Mathews, Marshawn Lynch, D Brown, Green-Ellis
WR: Randy Moss, Dez Bryant, Kevin Walter, Mike Wallace, Terrell Owens, Lance Moore
TE: Vernon Davis
K: Stephen Gostkowski
Def: Pittsburgh

League - 12 teams - Head to Head - PPR
Starters - QB, 2 WR, 2 RB, W/R, TE, K, Def