In his first three pro seasons, catcher Joe Mack hit 18 doubles and 12 home runs in 650 at-bats. This season, Mack hit 30 doubles and 24 homers in 472 at-bats. His OPS rose from .582 at High-A ...

As for Joe Mack, the 18-year-old committed to Clemson University but instead signed with the Marlins for $2.5 million, which was $188,000 over slot. A 6-1, 205-pounder, Mack’s biggest tool is ...