Based strictly on signing bonuses, Georgia Tech safety Isaiah Johnson is the Detroit Lions' top 2015 undrafted free agent. He received $12,000 upon signing, putting him atop the Lions' UDFA signing bonus list for 2015.
Measurables
Height: 6-foot-1 | Weight: 202 pounds
Stats
2010: 46 tackles, 3.0 TFL, 1.0 sack, 1 INT, 2 PD, 1 FF
2011: 78 tackles, 3.0 TFL, 1.0 sack, 3 INT, 6 PD, 1 TD
2012: 87 tackles, 4.5 TFL, 1.0 sack, 1 INT, 2 PD, 1 FF, 1 TD
2014: 72 tackles, 3.0 TFL, 1 INT, 5 PD, 2 FF
Random fact
Not only does Johnson share a last name with Lions wide receiver Calvin Johnson, but both players attended the same college (Georgia Tech) and the same high school (Sandy Creek).