Rainer also played for the Jacksonville Jaguars, Detroit Lions, and Houston Texans.
[1] Rainer had a great rookie season leading the Browns in tackles with 136.
On April 20, 2002, the Browns traded Rainer along with the 79th overall pick of the 2002 NFL draft to the Jacksonville Jaguars for the 76th overall pick of the 2002 NFL Draft.
In his only season with the Jaguars he started 14 of 16 games at middle linebacker for the team and recorded 92 tackles.
On April 2, 2003 Rainer signed with the Detroit Lions.