Irv is a different type of TE, and some teams like them while others do not. He is a pass catcher, not a blocker. He is not OJ Howard, who learned to block before moving to the NFL. Some teams won't even look at him because of his poor blocking. Where he is taken is totally based on need and philosophy, not his measurables. He is, IMO, a big WR, not an NFL TE.
Where is the idea Irv is a poor blocker coming from?