The Cleveland Browns hit the ground running when it came to revamping their defense at the start of free agency at 4:01 p.m. Tuesday, and have reportedly reached agreements with safety Donte Whitner and inside linebacker Karlos Dansby.

According to ESPN's Adam Schefter, Whitner's contract is worth $28 million over four years, while Dansby will earn $24 million over four seasons, with $10 million guaranteed.

It is a homecoming of sorts for Whitner, who grew up in Cleveland, went to Glenville High School, where he played for Ted Ginn, Sr., and later played for the Ohio State Buckeyes.

A first-round pick of the Buffalo Bills in the 2006 NFL Draft, Whitner spent the last three seasons in San Francisco, where he anchored a 49ers secondary that put the team in three straight NFC Championship Games.

In eight previous seasons, Whitner has registered 669 total tackles, including 492 solo stops and 177 assists. He has defended 45 passes and intercepted 10 others, two of which he returned for scores.

Whitner brings a hard-hitting attitude to Cleveland, one that has resulted in eight career forced fumbles.

Last season, Whitner made 73 total tackles, including 58 solo stops. He broke up a career-high 12 passes, intercepted two others and matched a personal best with two forced fumbles.

Dansby is entering his 11th NFL season after spending last year with the Arizona Cardinals.

Originally a second-round pick of the Cardinals in 2004, Dansby spent the first six years of his career in Arizona before going to Miami from 2010 to 2012. During his career, Dansby has made 1,007 total tackles, 821 solo stops and 186 assists. He has registered 38 sacks, defended 61 passes, intercepted 15 others, including four he returned for touchdowns, and forced 16 fumbles.

In 2013, Dansby registered 122 total tackles in 16 starts with the Cardinals. He had career highs with 114 solo stops, 19 passes defended, and four interceptions, matched another with two interception returns for touchdowns, and had 6.5 sacks, the second-highest single-season total of his career.