Twins promote top prospect Walker Jenkins to Triple-A St. Paul and Twins fans are buzzingThe Twins promoted outfielder Walker Jenkins to Triple-A St. Paul on Sunday, according to Twins Daily's JD Cameron. Jenkins, 20, slashed .309/.426/.487 (156 wRC+) with seven home runs in 52 games for Double-A Wichita this season. When will Twins' top prospect Walker Jenkins make his MLB debut? While Jenkins's main focus at the moment likely is to help the Saints win ball games, Twins fans are eager to see him make the jump to the big league level. There is also a small possibility that the Twins will promote Jenkins in late September once the Triple-A season ends so that he can get his feet wet in the major leagues.