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Rougned Odor
Rougned Odor (Rougned Roberto Odor, "El Tipo"), Venezuelan second baseman born 1994 in Maracaibo; Texas Rangers 2014-2020, Yankees, Orioles, Padres; career .230 with 178 HR; punched Jose Bautista in 2016.
Rounders
Rounders, also called Irish rounders, is a bat-and-ball team game of English origin, played chiefly in Britain and Ireland, and long described as a source of baseball.
Rowdy Tellez
Rowdy Tellez (Ryan John Tellez, born 1995) is an American MLB first baseman and left-handed power hitter for the Atlanta Braves, formerly Toronto, Milwaukee, Pittsburgh, Seattle, and Texas; 123 career home runs.
Roy Campanella
Roy Campanella ("Campy"), 1921-1993, American catcher; Negro Leagues star with the Baltimore Elite Giants, then Brooklyn Dodgers 1948-1957; three NL MVPs (1951, 1953, 1955), 1955 World Series champion, Hall of Fame 1969; career ended by 1958 auto accident.
Roy Halladay
Roy Halladay (Harry Leroy Halladay), MLB pitcher 1998-2013 for Blue Jays and Phillies; two-time Cy Young winner, 203-105, 2010 perfect game and postseason no-hitter; died 2017; Hall of Fame 2019 first ballot.
Roy Oswalt
Roy Oswalt (born 1977) is a former MLB right-handed pitcher, mainly with the Houston Astros (2001-10): 163-102, 3.36 ERA, 1,852 strikeouts, 2005 NLCS MVP, 2004 NL wins leader, 2006 ERA title, 2000 Olympic gold.
Royal Oak Leprechauns
Royal Oak Leprechauns: non-profit collegiate summer wood-bat baseball team in Royal Oak, Michigan; Northwoods League member since 2024, plays at Memorial Park; won its first Northwoods League championship in 2026.
Rube Foster
Rube Foster (Andrew Bishop Foster, 1879-1930), Negro leagues pitcher, manager, and owner of the Chicago American Giants; founded the Negro National League in 1920 and was elected to the Baseball Hall of Fame in 1981.
Rube Waddell
Rube Waddell (George Edward Waddell, 1876-1914), Hall of Fame left-handed pitcher for the Philadelphia Athletics; 193-143, 2.16 ERA, 2,316 strikeouts, 1905 AL Triple Crown, famous for eccentric behavior.
Rule 5 draft
Rule 5 Draft: annual MLB December draft of unprotected minor leaguers, dating to 1892. $100,000 fee, pick must stay on the MLB roster all season or be offered back for $50,000; famous pick Roberto Clemente (1954).
Rules of baseball
Rules of baseball: the codified playing rules, chiefly MLB's Official Baseball Rules, plus WBSC, NCAA, and NFHS codes. Covers strike zone, infield fly, balks, 2023 pitch-clock and shift changes, and ABS adoption for 2026.
Run (baseball)
Run (baseball): the unit of scoring, credited when a player legally touches home plate. Covers run scored, earned vs. unearned runs, RBI, Rule 5.08, and run-estimation metrics like Runs Created and BaseRuns.
Run batted in
Run batted in (RBI) is a baseball statistic credited to a batter whose batting action scores a run; also called ribbies. Excluded on errors and double plays; first published by the Chicago Tribune in 1880.
Rusty Staub
Rusty Staub (Daniel Joseph Staub, "Le Grand Orange"), MLB outfielder/first baseman 1963-1985 for Astros, Expos, Mets, Tigers, Rangers; only player with 500+ hits for four teams; died 2018.
Ryan Braun
Ryan Braun, "Hebrew Hammer," Brewers left fielder 2007-2020; 2007 NL Rookie of the Year, 2011 NL MVP, six-time All-Star, 352 career home runs; 2013 65-game Biogenesis PED suspension; retired 2021, Brewers Walk of Fame 2024.
Ryan Franklin
Ryan Ray Franklin (born 1973, Fort Smith, Arkansas), American pitcher; won baseball gold for USA at Sydney 2000 going 3-0, 0.00; MLB 1999-2011 with Mariners, Phillies, Reds, Cardinals; 62-76, 4.14 ERA, 84 saves; 2009 All-Star; later Cardinals front office.
Ryan Gusto
Ryan Cole Gusto (born 1999) is an MLB right-handed pitcher for the Miami Marlins, formerly the Houston Astros, who debuted March 31, 2025 and won the 2024 Pacific Coast League ERA title with Sugar Land.
Ryan Howard
Ryan Howard (The Big Piece), born 1979, American MLB first baseman for the Philadelphia Phillies 2004-2015; 2005 NL Rookie of the Year, 2006 NL MVP with 58 home runs, 2008 World Series champion, 382 career home runs.
Ryan Jeffers
Ryan Jeffers (born 1997, Raleigh, NC) is a Minnesota Twins catcher, 2018 second-round pick (59th overall) from UNC Wilmington; MLB debut 2020, 82 career home runs, .928 OPS in 2026, hamate injury.
Ryan Johnson (baseball)
Ryan Christopher Johnson (born 2002), Angels right-handed pitcher; drafted 74th overall in 2024 from Dallas Baptist, debuted Opening Day 2025 as the 24th player to skip the minors entirely.
Ryan Waldschmidt
Ryan Waldschmidt (born 2002, Sarasota, FL) is an Arizona Diamondbacks outfielder, the 31st overall 2024 PPI draft pick from Kentucky, D-backs 2025 Minor League Player of the Year, MLB debut May 8, 2026.
Ryan Ward (baseball)
Ryan Joseph Ward (born 1998) is an American left fielder, 2019 Dodgers 8th-round pick from Bryant, 2025 PCL MVP who led the minors with 36 home runs, debuted for Los Angeles April 19, 2026, and was released that September.
Ryan Zeferjahn
Ryan Zeferjahn (born 1998, Topeka, Kansas) is an American MLB relief pitcher, a 2019 third-round Red Sox draft pick from Kansas who debuted with the Angels in 2024 and was traded to the Chicago Cubs on August 3, 2026.
Ryan Zimmerman
Ryan Zimmerman, "Mr. National," first draft pick in Washington Nationals history (2005, 4th overall), 16-season third/first baseman, franchise leader in HR (284), hits (1,846), RBI (1,061), 2019 World Series champion, retired 2022.
Ryne Sandberg
Ryne Sandberg (1959-2025), "Ryno," Hall of Fame Chicago Cubs second baseman, 1984 NL MVP, 282 home runs, 9 Gold Gloves, died July 28, 2025 of prostate cancer.
Ryoji Kuribayashi
Ryoji Kuribayashi (栗林良吏), born 1996 in Aisai, Aichi, is a Hiroshima Toyo Carp right-handed pitcher, Tokyo 2020 Olympic gold medalist, and former NPB closer (134 saves, 2.22 career ERA) who became a starter in 2026.
Ryon Healy
Ryon Cristopher Healy (Bubba), born 1992, American MLB first/third baseman for Oakland, Seattle, and Milwaukee, 2016-2020; career .261, 69 HR; later KBO Hanwha Eagles and Rays minor leaguer.
Ryosuke Kikuchi
Ryosuke Kikuchi (菊池 涼介), born 1990, is a Japanese second baseman for the Hiroshima Toyo Carp (NPB), a 2011 second-round draftee, Tokyo 2020 Olympic gold medalist with Samurai Japan, and 2017 WBC infielder with 1,898 career hits through 2026.
Ryoya Kurihara
Ryoya Kurihara (栗原 陵矢), Japanese NPB player for the Fukuoka SoftBank Hawks; catcher, infielder, and outfielder; 2020 Japan Series MVP and Tokyo 2020 Olympic baseball gold medalist.
Ryutaro Umeno
Ryutaro Umeno (梅野 隆太郎, born 1991) is a Hanshin Tigers catcher in NPB, a 2013 fourth-round draftee, multi-year Golden Glove winner, and gold medalist in men's baseball for Japan at the 2020 Tokyo Olympics.