Catching prospect Max Pentecost, a notable omission when the Toronto Blue Jays set their 40-man roster earlier this week, was shut down during the final of the Arizona Fall League because of pain in his right shoulder.

The setback for the 11th overall pick in the 2014 draft helps explain why he wasn’t protected ahead of next month’s Rule 5 draft, the team surely calculating that with Pentecost’s injury history and staggered development, he’s unlikely to be selected, and less likely to stick for a full big-league season if chosen.

The Blue Jays also added catching prospects Danny Jansen and Reese McGuire to a 40-man roster that already included Russell Martin and Luke Maile, and carrying five catchers is a sub-optimal set-up.

“Ultimately we have to decide what we feel is the best chance for us to keep the most talent in our organization,” was how Blue Jays general manager Ross Atkins described the decision, adding later: “We’ll have plenty of time for (Pentecost) to become that person for us.”

Pentecost was behind the plate eight times in 21 days from Oct. 11-31 with the Peoria Javelinas in the AFL, his busiest stretch at catcher since his injury troubles began three years ago. He caught once more, Nov. 7, before missing the final eight games of the AFL schedule.