George Kirbys learning curve evolves as Mariners fall to Angels

SEATTLE — It’s easy to forget that Mariners pitcher George Kirby has yet to pitch an entire season in the major leagues and that he’s still nowhere near a finished product. This holds especially true if you watched closely what Kirby did last year over the final four-plus months of the regular season and playoffs following a promotion from Double-A Arkansas. He was good, like really good. On a handful of occasions, Kirby was great, posting a 3.39 ERA in 25 starts. On Monday against the Angels, Kirby’s first start of the season, he showed that his learning curve continues…