Philadelphia Eagles sign QB Ian Book and RB Lew Nichols to the practice squad and release DB Tariq Castro-Fields.

With the quarterback position suddenly an uncertainty, the Philadelphia Eagles signed Ian Book to the practice squad on Thursday. Book, who was brought in for a visit on Christmas Day,

Since getting drafted in the fourth round by the New Orleans Saints, he’s jumped around multiple organizations every season, without having an active roster spot. While Book was on the Kansas City Chiefs practice squad, they waived him prior to the start of the season.