Carradine, 6-foot-5 and 273 pounds, is coming off a late-season tear of his right ACL. Before the injury, he led his Florida State defense with 80 tackles and was second with 11 sacks.
Initially signing with Illinois out of high school, academic issues forced Carradine to enroll at Butler Community College, where he had 26 sacks in two seasons. He then joined Florida State after a heavy recruiting battle among top programs. In his first season at the Division-I level, he registered 5.5 sacks and eight tackles for loss. He had 13 tackles for loss his senior year.
According to reports, the 49ers sent defensive line coach Jim Tomsula to Cincinnati a week before the draft to attend Carradine's private workout.
Carradine figures to play defensive end and outside linebacker in the 3-4 scheme. His big frame might allow him to become a permanent fixture on the defensive line, as incumbent starter Justin Smith turns 34 in September and is in the final year of his contract.
In the trade with the Tennessee Titans, the 49ers picked up the 40th pick they used for Carradine, the Titans' seventh-round pick (No. 216 overall) and a third-round pick for 2014.