Sierra has been arguably the Blue Jays' most impressive rookie this year, and with a potential vacancy in left field next season, the final month of the year will serve as an extended audition for that role.
The 23-year-old Sierra has made the most of his opportunity so far, hitting .294 with a pair of home runs and five RBIs in 22 games entering Wednesday's series finale in New York. While other rookies like Anthony Gose have appeared overmatched at times, it's Sierra who has suddenly jumped up the club's depth chart.
"He has done a good job [with] his bat path staying in the strike zone," Blue Jays manager John Farrell said Wednesday. "He's been able to handle fastballs and breaking balls, as he did last night against [Phil] Hughes."
Farrell's also been impressed with the way Sierra has handled right field during Bautista's absence. There's still plenty of work to be done with the accuracy of his throws from the corner-outfield spot, and at times he has appeared a little too aggressive around the wall, but overall Farrell has come away with glowing reviews.
"His routes in right field have been very good, and not just with routine type of plays," Farrell said. "There have been some line drives, even in this series, that have been hit right at him that have tailed toward the line, where he has made an adjustment going for some fly balls. He has done a very good job."