|One of the worst things a pass catcher can do is short-arm the ball, but teams aren't concerned with Ertz's ability to hang on to the football. They're literally worried about his short arms. Ertz is expected to be perhaps the first tight end off the board come draft day, but his arms measured in at 31 3/4 inches at the combine, while Notre Dame's Tyler Eifert - the only tight end who teams believe to be as complete as Ertz - measured in at 33 1/8. Eifert is far from the only one with more reach than Ertz, and while the problem sounds somewhat trivial, NFL teams might not feel the same way. Short arms can be a severe hindrance for a tight end that's trying to deal with speed rushers on the outside, and he tends to get caught lunging in certain situations. What's not in question about Ertz, however, is his ability to put up big numbers in the passing game. After showing signs of promise in his first two seasons as a complement to 2012 second-rounder Coby Fleener at Stanford, Ertz caught 69 passes for 898 yards - totals no tight end in the nation surpassed - and six touchdowns in 2012. He's fairly fast for a tight end, but more importantly knows how to run a route. He sells his patterns well and is clean coming out of his breaks. Ertz also has made his fair share of acrobatic catches for someone who added 30 pounds of bulk since arriving in Palo Alto. Ertz's arms might have teams concerned, but ultimately his production and potential to stretch the field vertically should be enough to get him picked late in the first round.