Strength or weakness? Strength. All three of Green Bay's tight ends have the ability to stretch the field for the offense, which creates problems for opposing defenses. Lee, entering his sixth season and fourth with the Packers, is in the prime of his career. He is coming off his best season as a pro in which he finished third on the team in receptions with 48 for 575 yards and six touchdowns. He showed an ability to stretch the field (12.0 avg. catch) and block as well.
Though Humphrey and Finley have never caught a pass in a regular season game, both have the ability to make an impact for the offense. Humphrey sat out last season with a broken lower leg, but showed this offseason an ability to block as well as catch the ball and make plays. He officially is listed as the backup to Lee, though, that could change if Finley improves on his blocking more in practice.
Finley, a younger version of former Packers tight end Bubba Franks, has great hands and better quickness and speed than Humphrey. However, the team's third-round pick in this year's NFL draft probably needs to bulk up a little to better handle NFL defensive linemen.