KANSAS CITY, Mo. (AP) — Alex Smith’s efficient performance for the Kansas City Chiefs became even more impressive on Monday.The quarterback sprained his throwing shoulder late in the first half of Sunday’s game against the St. Louis Rams. Not only did Smith never miss a snap, he went on to complete 24 of 28 passes for 226 yards in what turned into a 34-7 rout at Arrowhead Stadium.Smith never mentioned the injury in his postgame remarks. It wasn’t until Chiefs coach Andy Reid brought it up Monday that anybody learned of it outside the Kansas City locker room.“He was able to obviously go through the game and everything worked out OK, but a bit sore today,” Reid said.