BALL SECURITY: The Midshipmen have 12 turnovers through four games, just three short of matching their total from all of last season. Navy ranks 116th out of 120 Football Bowl Subdivision teams in turnover margin, with junior quarterback Trey Miller responsible for 10. Miller remains the starter, but if he has trouble securing the ball against Air Force, backup Keenan Reynolds stands to get snaps. The freshman relieved Miller midway through the fourth quarter of Saturday’s 12-0 loss to San Jose State.

RED-ZONE WOES: Navy has scored on just six of 11 trips inside the opposition 20-yard line. This year in the red zone, Navy has scored three touchdowns, kicked three field goals, lost the ball once on downs and had four turnovers, all by Miller.

GETTING DEFENSIVE: Navy’s opponents have converted 24 of 49 third-down attempts. That percentage (.490) is 104th in the country and has contributed to the Midshipmen falling on the short end of average time of possession. The Midshipmen also are one of three FBS teams not to have recovered a fumble, although the defense has not permitted a touchdown in nine consecutive quarters. It’s the longest streak by a Navy defense since 2008.

— Gene Wang

11:30 a.m. at Falcon Stadium, Colorado Springs.

TV: WUSA-9, WJZ-13. Radio: WFED (820, 1500 AM), WNAV (1430 AM).

Records: Midshipmen 1-3;

Falcons 2-2.