Question: How many seasons did the oldest starting Whiz Kids player spend in the minor baseball leagues ?

text: Whiz Kids (baseball)
Roster
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The Whiz Kids is the nickname of the 1950 Philadelphia Phillies of Major League Baseball. The team was largely made up of rookies; The average age of a member of the Whiz Kids was 26.4 The team won the 1950 National League pennant but failed to win the World Series. After owner R. R. M. Carpenter, Jr. built a team of bonus babies, the 1950 team won for the majority of the season, but slumped late, allowing the defending National League champion Brooklyn Dodgers to gain ground in the last two weeks. The final series of the season was against Brooklyn, and the final game pitted the Opening Day starting pitchers, right-handers Robin Roberts and Don Newcombe, against one another. The Phillies defeated the Dodgers in extra innings in the final game of the season on a three-run home run by Dick Sisler in the top of the tenth inning. In the World Series which followed, the Whiz Kids were swept by the New York Yankees, who won their second of five consecutive World Series championships. The failure of the Whiz Kids to win another pennant after their lone successful season has been attributed to multiple theories, the most prominent of which is Carpenter's unwillingness to integrate his team after winning a pennant with an all-white team.
Name Age Position Selected statistics
Richie Ashburn * 23 OF .303 batting average 14 triples 14 stolen bases
Johnny Blatnik 29 OF 1 hit in 4 at-bats ( 6 plate appearances )
Jimmy Bloodworth 32 2B .229 batting average 2 doubles 13 RBI
Hank Borowy 34 P 4 earned runs allowed in ​ 6 ⁄ 3 innings pitched
Jack Brittin 26 P 2 earned runs allowed in 4 innings pitched
Putsy Caballero 22 IF 4 hits in 26 plate appearances
Milo Candini 32 RP 1-0 record 2.70 ERA ( 9 earned runs ) 30 innings pitched in 18 games
Bubba Church 25 SP 8-6 record 50 strikeouts in 142 innings pitched 2.73 ERA
Blix Donnelly 36 RP 2-4 record 4.29 ERA 10 strikeouts and 10 walks
Del Ennis * 25 OF .311 batting average 31 home runs 126 RBI
Mike Goliat * 28 2B .680 on-base plus slugging percentage 13 home runs 64 RBI
Granny Hamner * 23 SS .270 batting average 27 doubles 82 RBI
Ken Heintzelman 34 SP 3-9 record 4.09 ERA ​ 125 ⁄ 3 innings pitched
Stan Hollmig 24 OF 3 hits in 12 plate appearances
Ken Johnson 27 RP 4-1 record 3 home runs allowed in ​ 60 ⁄ 3 innings pitched 4.01 ERA
Willie Jones * 24 3B .267 batting average 25 home runs 88 RBI
Jim Konstanty 33 Closer 16-7 record 22 saves in 152 innings pitched 56 strikeouts and 50 walks
Stan Lopata 24 C .209 batting average 2 doubles and 2 triples 11 RBI
Jackie Mayo 24 OF 8 hits in 38 plate appearances
Russ Meyer 26 SP 9-11 record 74 strikeouts in ​ 159 ⁄ 3 innings pitched 5.30 ERA