The N.F.L. playoff game was still going on, mind you, while the Philadelphia Eagles star receiver A.J. Brown was engaged in some behavior you seldom see on a football sideline. He was reading. A book.

BOISE, Idaho — The west sideline at Albertsons Stadium will host the Boise State football team during home games this fall for the first time since the stadium opened in 1970.

Fox sideline reporter Jenny Taft, center, dashes across the field at the 30 yard line during a time out in the first period of the DC Defenders vs. Houston Roughnecks UFL game held at TDECU ...