Allen signed a two-year, $8 million deal with New England this offseason but has been out since training camp with an injury.
Allen, 28, is a former seventh-round pick by the Eagles in the 2014 NFL Draft. He played out the final year of a four-year rookie contract worth $2,282,248 before agreeing to a three-year, $15 million contract with the Buccaneers in 2018.
Allen agreed to a $1 million pay cut last offseason that voided his $5 million base salary for 2020. From there, he signed a two-year contract that carries a max value of $8 million with the Patriots.
In 2019, Allen appeared in 13 games for the Buccaneers and recorded 10 total tackles, two tackles for loss, and 0.5 of a sack.