(AP) — The nerves were obvious when the Chiefs' Aaron Murray rolled to his left late in the first half Friday night, looked downfield and threw a perfect pass — right to a Tennessee defender. The former fifth-round draft pick got his first chance to work with Kansas City's top offense this preseason, throwing for 146 yards and two touchdowns in a weather-shortened 34-10 win over the Titans. Everything is a learning experience for Murray, whose spot as the third-string quarterback is comfortable in Kansas City. [...] after a turnover, Murray hit Williams again from 4 yards for another touchdown that put things well out of reach. The third-round pick had three catches for 30 yards as he made up for time lost to a training camp injury. Reid said before the game that Smith and the starters would likely play the first three quarters in their final dress rehearsal for the regular season. [...] when he called for Murray just before halftime, the quarterback was as surprised as anybody inside Arrowhead Stadium. Reid said that LT Eric Fisher (ankle) and RG Jeff Allen (knee) are unlikely to play in the Chiefs' final preseason game Thursday night in St.