The team announced Monday that Crossman would not return next season. Crossman's coaching was scrutinized after Detroit became the first team since at least 1940 to give up a kickoff and a punt return for touchdowns in consecutive games last season.
The Lions hired running backs coach Curtis Modkins and tight ends coach Bobby Johnson. They announced Tim Lappano will move from coaching tight ends to receivers and Jeremiah Washburn was promoted to offensive line coach.
Detroit didn't retain receivers coach Shawn Jefferson, running backs coach Sam Gash or offensive line coach George Yarno when their contracts expired following the Lions' 4-12 season.
The Associated Press contributed to this report.