Hull, 27, signed on with the Dolphins as an undrafted free agent out of Penn State back in 2015. He was among the Dolphins’ final roster cuts coming out of the preseason but was later added to their practice squad.
Since then, Hull has returned to the Dolphins on one-year, exclusive rights contracts. Miami placed him on injured reserve at the start of the regular season.
In 2017, Hull appeared in all 16 games for the Dolphins and recorded 35 tackles and a fumble recovery.
Brendel, 25, wound up signing on with the Cowboys as an undrafted free agent out of UCLA back in 2016. He was waived coming out of the preseason and later signed to Dallas’ practice squad.
After being released by the Cowboys, Brendel signed on to the Dolphins’ practice squad and managed to make the 53-man roster last year. Miami brought him back on a futures contract this past April.
In 2017, Brendel was active for all 16 games and played a total of 67 snaps, according to Pro Football Focus.