Remember, Pettigrew tore his ACL tendon during the Thanksgiving game last year and isn't expected to be back till training game. It is a serious injury and many people never fully recover from it.
Not to mention, their back-up TE retired at the end of the season and they have no one behind Pettigrew.
Further, Scott Linehan loves 2 TE sets.
Scheffler is on the last year of his contract, and the Lions made sure that he wouldn't seek a new contract if signed, so he won't hold out. This may be just a one year thing.
Also, Sims not only doesn't fit the scheme because he is too small, but he has been very injury prone the last few years and has shown signs of decline in production and has been a liability against the run.
Altogether, not a wholly bad move by the Lions to add another pass threat -- their 2 TE sets will be scary stuff and will help the run immensely.
[ Edited by RedWaltz24 on Apr 19, 2010 at 11:16 AM ]