This shouldn't be surprising.
The exodus of New York Giants assistant coaches has reportedly begun with FOX Sports reporting that linebackers coach Jim Herrmann has accepted the same job with the Indianapolis Colts. Herrmann had been Giants' linebackers coach for the past seven seasons.
There have also been reports of other Giants' assistants interviewing for new positions. Offensive line coach Pat Flaherty has been connected to that job in Indianapolis. Wide receivers coach Sean Ryan is considered a candidate for that same job with the Tennessee Titans.