By Matt Audilet Just last month, the Arizona Cardinals re-signed veteran backup Colt McCoy as their No. 2 option behind incumbent starter Kyler Murray. McCoy got a chance to witness Murray’s third NFL season first-hand in 2021 — including all the ups (second Pro-Bowl selection) and downs (early postseason exit). The 35-year-old backup shared his thoughts on Murray as he heads into Year 4. “He’s just finished his third year in the NFL, I would say that his arrow is pointing up,” McCoy said, per Howard Balzer of All Cardinals. “[Offensive] Rookie of the Year, he’s made two Pro Bowls, the guy’s e…