 Neibauer akaberekerwa uye akakurira muBillings, Montana, akazotamira kuNebraska, pamwe chete nemhuri yake. PaUniversity of Nebraska, akawana tsamba ye varsity mumitambo mina. Neibauer akasarudzwa mumatanho ese ari maviri uye echipiri e1966 Major League Baseball Draft neCleveland Indians neBraves, zvichiteerana, uye akasaina neAtlanta mushure mekutadza kusaina chibvumirano neCleveland. Muna 1966 na1967, akatamba kuAustin Braves yeTexas League, asati awana kukwidziridzwa kuRichmond Braves yeInternational League mugore rekupedzisira. Braves yakasimudzira Neibauer zvakare muna 1969, panguva ino kuMajor Leagues; akaita basa rake rekutanga muna Kubvumbi 12 mumutambo wakanangana neCincinnati Reds. Mumwaka wake wekutanga weMajor League, Neibauer akakanda mumitambo makumi maviri nemapfumbamwe uye aive ne1 2 win kurasikirwa rekodhi uye 3.90 ERA mumainnings akakanda. Mukuwedzera, akaisa imwe inning muMutambo 2 panguva ye1969 National League Championship Series, kusabvumira kurova kana kumhanya. 