NEW YORK (AP) — The Eagles-Seahawks game in Week 15 has become the first NFL game flexed to Monday night. The league moved the Kansas City Chiefs at New England Patriots to 1 p.m. on Sunday to put Philadelphia at Seattle on prime-time television on Dec. 18. The NFL also announced a tripleheader on Saturday, Dec. 16. The Minnesota Vikings visit the Cincinnati Bengals in the early game. The Pittsburgh Steelers play at the Indianapolis Colts in the afternoon. The Denver Broncos and Detroit Lions fa