Rey Maualuga (2008)
Since being moved from outside linebacker to middle linebacker, times have been rough for poor Maualuga, especially in 2012. He was the lone weakness in a pretty solid linebacking corps for the Bengals. He missed a lot of tackles and looked lost and confused at times.
Jordan Shipley (2010)
This kid showed quite a bit of promise as a slot receiver coming out of Texas, but he got hurt and was never heard from again in Cincinnati……………….
Carson Palmer (Yes, he goes in both categories)
I know what you are thinking, I am contradicting myself, but Palmer did stab the Bengals in the back, as well as the Raiders and soon enough the Cardinals. He was a 4000 yard passer, and a 30 touchdown passer, but was also a 15 interception passer, and was quite injury prone. He had consistency issues. He had no mobility, and panicked a lot in the pocket. Sure, he was a great player for a few years, one of the best QBs in the league even, but he is gone now, and had bad times near the end, therefore, he is a waste. He did some things to get on my list of best draft picks, but did things to get on my list of worst draft picks.