You name it, Seth Joyner could do it at Linebacker.

It took a while before Joyner proved his professional worth, as the 1986 208^th Overall Pick was cut in his first training camp before he was resigned.  Joyner started seven games as a rookie, but was a starter afterward, where he showed an incredible body of work that allowed him to cover anyone on the field.  He could attack the Quarterback, stuff the run, and block lanes with the best of them. 

Joyner had his peak year in 1991, when he won his first Pro Bowl in a campaign in which he was fifth in MVP voting and second in Defensive Player of the Year Voting. It was a phenomenal campaign and one of the more incredible years that split what an interior Linebacker could do.  After another good year, Joyner went to his second Pro Bowl; he signed with the Arizona Cardinals.

It was a good three-year run for Joyner, who added his third Pro Bowl in 1994, and played more action at Strong Safety, showcasing his exceptional talents.  In his last two seasons, Joyner was a hired gun of sorts, providing veteran leadership, first on a Green Bay team that lost in Super Bowl XXXII to Denver, and then on that same Denver team that repeated in Super Bowl XXXIII.  That was his swansong as a player, and that is the best way to go out.

He retired as one of the few players in the 20 Sacks/20 Interceptions club.

Riley Matheson arrived in Cleveland with little (really no) fanfare to join the Rams in 1939 after going undrafted from Texas-El Paso.  Playing at both Offensive Lineman, Matheson broke out in 1942, earning his first First Team All-Pro, while also capturing that honor in 1944 and 1945.  Granted, this happened during World War II, where the league was depleted during World War II, but the NFL Champion in ’45 was out to prove he was there to stay.