New England Patriots mock draft: Rounds 5 through 7
The TCU product is good size at 6'6" and 320 pounds and has good quickness for his size. He also has good versatility and can play a number of spots along the offensive line. However, part of the issue with this season for the Patriots was that New England moved linemen around too much. Coleman needs to just stick at guard and take a year to develop, and they should be a capable starter.
For a team like the Patriots that used to know how to keep their tight ends productive, that doesn't seem to have happened as much lately. Castles isn't exactly Rob Gronkowski as, well...who is? But Castles has good speed for his 6'5" and 250 pounds, and he doesn't mind challenging for a pass in traffic. The oddness is that while he has speed, he does not seem to get much separation. This might change with more focused coaching. No offense to the University of Tennessee where Castles finished his college career, however, Castles was there for only one year. He also played at Cal and UC Davis.
Miami's Davis is 5'9" and 180 pounds, so he is likely more of a fit in the slot, but he does have enough quickness to bounce outside if needed. He is an intelligent player who seems to read what the offense is going to do pre-snap. His issues would be that he gets crossed-up in coverage and, once beaten, does not have the explosive speed to catch up.