The Miami Dolphins have announced that tight end Dwayne Allen will begin training camp on the physically unable to perform list, per Mike Florio of Pro Football Talk.

Allen, who signed a two-year, $6.5 million contract with the Dolphins back in March, joins linebacker Mike Hull and cornerback Cordrea Tankersly on the PUP. They’ll remain there until they pass a physical. Eventually, a decision could be needed as to each of them regarding whether they’ll spend at least the first six weeks of the regular season on the PUP list.

Without any more details, it's not certain when the tight end will be able to return. Allen missed three regular-season games over the last two seasons, which he played with Miami's division rivals, the New England Patriots.

An Indianapolis Colt for the first five years of his career, Allen was traded to New England on March 9, 2017. The Colts sent Allen and a 2017 sixth-round draft pick to New England for a 2017 fourth-round draft pick. The trade was the first between the Colts and Patriots since 1985.

Over those two seasons, Allen started 16 games but wasn't often utilized in the Patriot's offense. He had just 13 receptions for 113 yards an a touchdown. He was the 68th player to catch a touchdown pass from Tom Brady and won a Super Bowl last year the team against the Los Angles Rams.

Allen played college football for Clemson University, where he earned consensus All-American honors and was recognized as the most outstanding college tight end in 2011. He was selected by the Colts in the third round of the 2012 NFL Draft. In five seasons with Indianapolis, Allen had 126 receptions for 1,451 yards and 19 touchdowns.

In the last four years, Allen will have gone from catching passes from Andrew Luck to Tom Brady and now to either Ryan Fitzpatrick or Josh Rosen.