Complex sentence: On January 15,, Ozuna signed a minor league contract with an invitation to spring training with the Philadelphia Phillies, but began the season with the Phillies AAA minor league team, Lehigh Valley Iron Pigs.
Split into simpler sentences: On January 15,, Ozuna signed a minor league contract with an invitation to spring training with the Philadelphia Phillies. Optioned to Phillies AAA minor league team, Lehigh Valley Iron Pigs.