In yet another sign that the Cardinals are planning to continue building around the blossoming young talent in their Minor League system, the club added four rising prospects to their 40-man roster on Tuesday and designated veteran reliever Jorge Alcala for assignment .

Catcher Leonardo Bernal ( No. 4 prospect per MLB Pipeline), outfielder Joshua Baez ( No. 11 ) and left-handed pitchers Cooper Hjerpe ( No. 13 ) and Brycen Mautz ( No. 21 ) were added to the Cardinals' roster to protect them from being potentially plucked in the Dec. 10 Rule 5 Draft. Alcala, who was claimed on Aug. 7 after being DFA'd by the Red Sox, was designated for assignment to make room on a roster that was at 37 players coming into Tuesday.

Left-hander Pete Hansen , a third-round Draft pick i

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