DiManche, 24, signed on with the Bengals as an undrafted free agent out of Southern Illinois back in 2013. He was waived/injured during the first round of roster cuts and eventually released from injured reserve with a settlement.
In 2014, DiManche appeared in 14 games for the Bengals and recorded 11 tackles and a forced fumble before he was placed on season-ending injured reserve with a broken forearm.
Johnson, 25, is a former seventh-round pick of the 49ers back in 2012. He was unfortunately unable to make the 53-man roster in his rookie season, but later signed to their practice squad.
San Francisco wound up sending him to the Colts in return for 2015 conditional seventh-round pick that became Geoff Swaim.
Indianapolis elected to re-sign Johnson to an exclusive rights tender back in March before waiving him as they cut their roster down to 75 players.