Notre Dame defensive lineman Sheldon Day is likely one of the Irish's best defenders, but NFL scouts are concerned about his size and don't think he will transition to the league well, according to Lance Zierlein of college football 24/7.

Day is a captain on the defense, and he creates havoc for opposing offenses. In two games this season, Day has gotten a sack and already made two tackles for losses. Day has moved inside from defensive end to defensive tackle this season, but he will likely need to gain more weight for draft prospects to become more interested.

Day is listed at 6-foot-2, 285 pounds, according to ESPN, but some scouts think that listing is taller than his actual height, according to Zierlein. Day's lack of arm length also make scouts question his ability at the next level, as defensive linemen need to extend their arms while grabbing offensive lineman. Day will need to see around offensive lineman to see where the ball is going and facing lineman two or three inches taller than him could make it difficult.

Scouts think his move inside is a good idea, but he will likely need to gain weight so that he isn't pushed around in the league. When watching Notre Dame it is easy to tell which one is Day because he is usually pushing linemen back or forcing the quarterback to make a poor decision. Day will likely make it to the NFL, but he has a better chance to fit a 4-3 system then a 3-4 system.