After not appearing in 2011, Holdzkom spent 2012 with the Cinicinnati Reds' Class A Advanced affiliate, the Bakersfield Blaze of the California League, finishing the year pitching for the Diamondblacks in Taiwan in the World Baseball Classic Qualifiers before playing in a couple of seasons in the Australian Baseball League (ABL).
Shortly after his second stint in the ABL, Holdzkom transformed himself from a starting pitcher to a flame-throwing reliever, reaching speeds of close to 100 mph (160km/hr) and drawing international attention for his skills on the mound, but unfortunately after his magical run in 2014 his velocity dropped last year due to his shoulder problem and this led to his release from Pittsburgh.
Last year also ended sadly for Holdzkom after his brother Lincoln was tragically killed in a motor vehicle accident just before Christmas and his injury plagued 2015 meant he wasn't released by the Pirates to play for the New Zealand Diamondblacks in the recent World Baseball Classic Qualifier, which was a big disappointment for him, he recalled.
"It was gut wrenching to miss the WBC, because in my eyes, international competition is the most pure form of competition," said Holdzkom, who added that he was excited by the change in scenery and his chances to move up to the majors with the White Sox who have gotten out of the gate quickly this year and are at the top of the standings in their respective division.
American born with a Kiwi father, Holdzkom pitched well for New Zealand at the World Baseball Classic qualifier in Taiwan in November 2012 and was signed by the Pirates on the back of some sparkling form in the American Association of Independent Baseball, maintaining a miniscule 1.17 ERA in nine appearances (runs allowed per inning) out of the bullpen for Amarillo in 2014.
With more Kiwi baseball players being noticed by Asian and North American professional and collegiate teams, Baseball New Zealand CEO Ryan Flynn says his organisation must work diligently to provide young players with the necessary training and competition that can lead to these opportunities being afforded to our young men. "We have momentum right now," said Flynn, "and it's because of our talented young men like John and others moving up the ranks."
Holdzkom, Cleveland Indians minor league pitcher Nick Maronde and Arizona Diamondbacks outfielder Max Brown are the current Kiwi flagbearers in the professional game signed to major league organisations, whilst a host of young Kiwis are forging careers in independent and college baseball in Asia and across the United States.
Flynn added that this also means it is imperative that the sport's governing body must get a franchise into the ABL as soon as possible to open the door to the thousands of young Kiwi athletes moving to the sport of baseball-a move that baseball officials believe now hinges on constructing an acceptable facility or minor league-type stadium in Auckland for the franchise to operate in during the next two baseball seasons.
