King will now miss at least the first six games of the regular season before he can be activated from the PUP list.
King, 27, wound up signing on with the Patriots as an undrafted free agent out of Auburn back in May of 2015. He was unfortunately among their final roster cuts that season but was later signed to their practice squad.
The Patriots brought King back on exclusive rights contracts before signing him to a two-year, $2.6m deal in 2018. He was placed on injured reserve during the preseason.
In 2018, King appeared in 15 games for the Patriots and recorded seven tackles.