Bell Going out for Passes Doesn't Bode Well.

seems like when we send bell into the pattern for a pass he gets hurt.
Last year against cincy and also this past sunday as well.
Does anyone recall other than a screen pass if he went out for pass in the
BLT, @RAM, SD, AZ, @KC or games? Not sure if this is a conindicence or not but does this say anything or just pure darn bad luck.
In general I don't remember in the 1970's and the 1980's NFL action this many players getting knee injuries ACL/MCL and its not just steelers all across the league it seems.