Hostler, 47, has worked in the NFL since 2000. In 2003 and 2004, he served as the quarterbacks coach of the New York Jets, who happened to employ Doug Marrone as their offensive line coach at the time. Hostler then spent three seasons in San Francisco - coaching quarterbacks the first two seasons and calling the plays in the third - before latching on with the Baltimore Ravens in 2008, where he spent six seasons coaching wide receivers under John Harbaugh.
Earlier this week, the Ravens introduced former Houston head coach Gary Kubiak as their new offensive coordinator. Hostler had been up for that job, along with Kyle Shanahan, but after the job went to Kubiak, Hostler reportedly began looking for greener pastures. Thus, his move to Buffalo.
Hostler's hire is the second the team has made this offseason, following last week's signing of Todd Downing as quarterbacks coach, that adds a voice into the offensive meeting room alongside Marrone and coordinator Nathaniel Hackett. Buffalo still has a need for a receivers coach, so Hostler could be involved there, as well. That last is obviously just speculation on our part.
In addition to the need for a receivers coach, the Bills are also looking to re-tool the defensive side of the ball following last week's coordinator swap from Mike Pettine to Jim Schwartz.