- Bats Right, Throws Right
- Height 6' 3", Weight 209 lb.
- School New Mexico State University, Treasure Valley Community College, Mt. Hood Community College
- High School Idaho Falls High School
Riley Barr pitched in Germany.
He was All-State as a high school junior and senior.  He won 7 games with a 2.15 ERA at Treasure Valley Community College in 2011 then had 8 wins and a 2.73 ERA at Mt. Hood Community College in 2012.  After being redshirted, he was 5-3 with a 2.94 ERA in 27 games as a junior at New Mexico State. He fell to 4-7, 4.37 as a senior.
Barr signed with Germany's Mainz Athletics for 2017. He was the only pitcher to beat Curaçao Neptunus in the 2017 European Champions Cup, with a complete-game victory (6 H, 3 BB, 6 K, 6 R, 4 ER), beating former minor leaguer Misja Harcksen. His .176 opponent average was 4th in the event (between Kevin Heijstek and Mike Bolsenbroek) and only Diegomar Markwell worked more innings.  In the Bundesliga-1 regular season, he was 7-4 with a 2.42 ERA and 0.94 WHIP, walking only 9 in 89 1/3 innings. He was 4th in the Bundesliga-1 south in ERA (between Justin Erasmus and Clayton Freimuth), 7th with 64 K, tied Johannes Krumm and Jonathan Eisenhuth for 5th in wins, 3rd in IP (after Ryan Bollinger and Tim Stahlmann), 3rd in WHIP (after Bollinger and Gianfranco Rizzo) and 5th in opponent OPS (594). 
Moving to the Bonn Capitals in 2018, he shut out the Therwil Flyers in the opener, allowing only one hit (to Adrian Kaufmann) in seven while fanning 12 in a mercy rule rout. He then got the nod in the title game against the Borgerhout Squirrels and started with six shutout innings but was matched evenly by Kenny Vandenbranden. He allowed two in the 7th and took a tough loss. His 1.20 ERA was second in the event (behind Vandenbranden), he allowed the lowest average (.125, .51 better than former major leaguer Romulo Sánchez), he was second in IP (3 behind Vandenbranden) and he was second with 21 K (two behind Sánchez). 
In the '18 Bundesliga-1, he was 7-0 with a save and a 0.96 ERA for Bonn, fanning 72 and walking 13 in 56 1/3 IP. He was second in the Bundesliga-1 south in ERA (.58 behind teammate Markus Solbach), 7th in K (between Daniel Thieben and Matt Kemp), 2nd in wins (4 behind teammate Sascha Koch), 3rd in WHIP (behind Solbach and Koch) and 3rd in opponent OPS (452, behind Solbach and Koch). Bonn won its first championship.