<prompt> Nyorai kupfuurira kweiyi ndima - Jansen akadzokera kuPacific Coast League semutambi-murairidzi neSeattle 1955 na1957 nePortland 195860. Mushure mekufona kubva kune aimbove mutambi Alvin Dark, Jansen akadzokera kuMajor Leagues semurairidzi wekukanda weSan Francisco Giants muna, naDark semaneja. Jansen akaramba ari murairidzi wekukanda kwemwaka gumi nerimwe, uye akabatsira kukudziridza ramangwana Hall-of-Famers Juan Marichal naGaylord Perry. Munguva yehutungamiri hwake, maGiants akaita kuonekwa mu 1962 World Series uye 1971 National League Championship Series  <response>: . Akazoenda kune rake rekupedzisira MLB murairidzi webasa, achibata mbiya dzeChicago Cubs muna 73, achishanda nemaneja wake wekare weGiants, Leo Durocher, uyezve aimbove mutambi Whitey Lockman. 