Bodden's deal, which has club options through 2013, adds $27 million onto his contract including a $2 million signing bonus and an $8.6 million roster bonus if he's on the team next March.
Bodden was acquired from Cleveland, along with a third-round pick, in a February trade for defensive tackle Shaun Rogers.
Bodden had a career-high six interceptions and 76 tackles last season, his first as a full-time starter. In his first four seasons, he started 22 games.
Dizon, a linebacker, missed the first three practices of training camp before reaching an agreement between the two-a-day sessions Friday.
"The first rule of getting better is to show up to work," Lions coach Rod Marinelli said after the day's first practice.
Dizon was arrested for driving under the influence on April 20 in Colorado, six days before the draft, but the Lions did not learn about the incident until last month.
Financial terms were not available.