Joshua Alexander Guyer
- Bats Right, Throws Right
- Height 6' 2", Weight 185 lb.
Josh Guyer has pitched in Australia and the US and for the Australian national team.
He pitched 4 2/3 shutout innings for Australia in the 2012 U-18 Baseball World Cup, including saving Sam Holland's win over Italy.  He made his Australian Baseball League debut with the Sydney Blue Sox in the 2012-2013 ABL, working 6 1/3 shutout frames. He was signed by Minnesota Twins scout Howard Norsetter.  Debuting in the US in '13, he was 1-2 with a save and a 5.30 ERA for the GCL Twins, fanning 22 but walking 13 in 18 2/3 IP.
Guyer had a 1-2, 4.26 record for Sydney in 2013-2014. Moved primarily to the rotation, he was 1-1 with a 5.08 ERA for the 2014 GCL Twins. In the 2014 U-21 Baseball World Cup, he was 1-1 with a 1.35 ERA in three outings, beating the Netherlands and losing to Czechia.  He went 1-0 with a 4.05 ERA for the 2014-2015 Blue Sox but issued 13 walks in 13 1/3 innings. He ended his US time with the 2015 Elizabethton Twins, posting a 7.98 ERA and 1.98 WHIP in 13 relief appearances.
In the 2016 U-23 Baseball World Cup, he was 2-0 with no runs in 6 2/3 innings for the Aussies, beating both South Korea and Taiwan. He was 5th in ERA (four pitchers at 0.00 had more innings), leading Australia. He also tied for the event lead in wins.  H In the 2016-2017 ABL, he was 2-1 with a save and a 3.63 ERA for Sydney, whiffing 21 in 17 1/3 innings. He led his team in appearances (17) and was 6th in the ABL. He was on Australia's designated pitcher pool for the 2017 World Baseball Classic but was not activated. 
He was rocked for four runs in 2/3 of an inning for Sydney in 2017-2018, perhaps indicating injury. Returning to the rotation, he was excellent for the 2018-2019 Blue Sox at 7-1, 2.60 with only 10 walks in 55 1/3 innings. He tied Tim Atherton and Steve Kent for the league lead in wins, was 4th in ERA among those with 40+ IP (between Craig Anderson and Dushan Ruzic) and was 8th in strikeouts (54).
After pitching for Australia in the U18, U21 and U23 Baseball World Cups, he made it to Australia's main team for the 2019 Premier 12. He was dueling Cuba's Lázaro Blanco evenly through four shutout frames, fanning five of 12 batters and allowing no hits or walks. In the 5th, he allowed a hit to Alfredo Despaigne and walked Frederich Cepeda; Peter Moylan relieved and let both inherited runners score; Josh wound up with a no-decision as Australia tied it in the 6th. He also started in the second round against Mexico and allowed one run (a Jon Jones solo shot) in two innings before Kent relieved, Guyer losing to Eduardo Vera. He tied for 6th in the event in games started; only Atherton started more for Australia.