Ward, who turned 27 in December, was drafted 38th overall in 2010 by then-Cleveland GM and current Broncos pro personnel director Tom Heckert.
Denver has already signed a slew of former Browns players this offseason, but Ward would be the highest profile addition, by far.
The ex-Oregon Duck has started all 54 of the games he's played in his four seasons, totaling 325 tackles, five interceptions, 3.5 sacks, 24 passes defensed, and five forced fumbles.
Both of Ward's career defensive scores - one via pick, one via fumble - came in 2013, when he graded out at +14.5 over 1,124 snaps according to PFF.
That grade tied Ward with KC's Eric Berry as PFF's third ranked safety overall.
Fellow free agents Donte Whitner (+11.5, sixth best), Jairus Byrd (+9.9, eighth), and Louis Delmas (+2.0, 26th) all ranked higher than Denver's safeties, each of whom graded out in the negative.