Lions complete offensive staff

Let's update our earlier post on the Detroit Lions coaching staff. The team has announced replacements for the three assistant coaches that departed earlier this month. The news leaves only their special-teams coordinator position to be filled; it opened Monday when Danny Crossman departed to join the Buffalo Bills in a similar capacity.

A closer look at the changes:

Coach: Running backs/running game coordinator Curtis Modkins

Came from: Buffalo Bills, where he was offensive coordinator/running backs from 2010-12.

Comment: The Bills ranked fifth in the NFL last season in average yards per rush (5.0) and sixth in rushing yards (2,217).

Coach: Tight ends coach Bobby Johnson

Came from: Jacksonville Jaguars, where he was the tight ends coach in 2012

Comment: Johnson has spent most of his career as a college tight ends or offensive line coach.

Coach: Offensive line coach Jeremiah Washburn

Came from: Was the Lions' assistant offensive line coach from 2009-12.

Comment: He is the son of longtime NFL assistant Jim Washburn.

Coach: Wide receivers coach Tim Lappano

Came from: Was the Lions' tight ends coach from 2009-12.

Comment: Being entrusted with coaching Calvin Johnson is a prized promotion.