Manny Machado has agreed to the biggest free-agent contract in American sports history -- a 10-year, $300 million deal with the San Diego Padres, league sources told ESPN's Jeff Passan on Tuesday.

Machado, a four-time All-Star and two-time Gold Glove Award winner at third base, made $16 million between the Los Angeles Dodgers and Baltimore Orioles last season.

The deal with the Padres includes an opt-out after the fifth season, sources told Passan.

The 26-year-old slugger posted a career-high .905 OPS in 2018, finishing the season with a .297/.367/.538 slash line, 37 home runs, 107 RBIs and 14 stolen bases. In 66 regular-season games with the Dodgers, Machado hit .273 with 13 homers and 42 RBIs.