Article snapshot taken from Wikipedia with creative commons attribution-sharealike license.
Give it a read and then ask your questions in the chat.
We can research this topic together.
In his rookie season of 1980, Richardson set the record for most interceptions recorded by a linebacker (7), which he returned for 139 yards, while also recovering three fumbles. He won the AP Defensive Rookie of the Year in 1980 along with his teammate Buddy Curry, becoming the first (and so far only) time that two rookies shared the award in NFL history. Richardson made the NFL's All-Pro 2nd team. Richardson would have less to do in his next couple of seasons. He recorded an interception in 1981 and 1983 before retiring at the age of 28 in 1985. He finished his career with 9 interceptions, six fumble recoveries, and 9 sacks.