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Nov 10 (Reuters) - Cleveland Guardians pitcher Luis Ortiz is set to appear in a Boston courthouse on Monday after being charged for his alleged role in a scheme to rig bets on pitches during Major League Baseball games. Ortiz and teammate Emmanuel Clase allegedly agreed in advance to throw balls rather than strikes for specific pitches in exchange for bribes to rig proposition bets, according to the U.S. Attorney's Office for the Eastern District of New York. Sign up here. Proposition bets, known as "prop bets", are related to events or statistics within a game. An attorney for Ortiz said he was innocent of the charges. "He has never, and would never, improperly influence a game, not for anyone and not for anything," attorney Chris Georgalis said in a statement. "There is no credible evidence Luis knowingly did anything other than try to win games, with every pitch and in every inning," Georgalis said. "Luis looks forward to fighting these charges in court. The government's case is weak and circumstantial." Ortiz was arrested in Boston on Sunday and will be arraigned in the Eastern District of New York at a later date. Clase was not in U.S. custody as of Sunday. "Emmanuel Clase has devoted his life to baseball and doing everything in his power to help his team win," his attorney, Michael J. Ferrara, said in a statement. "Emmanuel is innocent of all charges and looks forward to clearing his name in court." Clase, a three-time All-Star who signed a five-year extension worth a reported $20 million with the Guardians in 2022, agreed to rig the prop bets beginning in 2023, according to the U.S. Attorney's Office, while Ortiz allegedly joined the scheme in 2025. The pair face decades in prison if found guilty. "MLB contacted federal law enforcement at the outset of its investigation and has fully cooperated throughout the process," the league said in a statement on Sunday. "Our investigation is ongoing." Rozier and Jones, among more than 30 people charged in connection with two related investigations, were accused of providing non-public information about games to criminal partners to set up bets. Sports betting has exploded in popularity across the U.S. since the Supreme Court paved the way for states to legalize it in 2018, with all of the men's "Big Four" North American leagues locked in agreements with official betting partners.