3 QB's? 10% of our roster is from the waiver wire

SR/MC:  the Bucs just picked up 5 players from the waiver wire.  Two questions:  one of these is a quarterback.  I don't know the rules, but does this mean we will carry three quarterbacks or can we put the one we got on the practice squad?  Am not sure what this means for the roster and...if anything...does it mean for Mike Glennon?Second, does the fact that almost 10 percent of our roster now comes from the waiver wire cuts, do you or others think this signals a lack of confidence or concern on Lovie's behalf for the roster he had?