Patriots, Broncos, Chargers have made good moves in recent days

Broncos sign quarterback Case Keenum. Yes, his ceiling may be the lowest of the four quarterbacks in the AFC West. He is better suited to dome ball that the Vikings provided him last year. Still, Keenum knows how to play and how to lead. Staring at dubious options elsewhere — holdovers Trevor Siemian, Paxton Lynch and Chad Kelley; angling for a quarterback with the fifth pick in the 2018 draft; the prospect of gashing his roster to sign Kirk Cousins — Broncos talent man John Elway came away with a serviceable starter in Keenum, 30, at a slightly below annual salary ($18 million) for the position the next two years. Keenum allows Denver to go for it now, if it desires, by trying to surround