Mariners draft notes: Top pick Logan Gilbert diagnosed with mono, third-round pick Cal Raleigh signs his contract

Florida State catcher Cal Raleigh attempts to tag out LSU shortstop Kramer Robertson in the ninth inning of an NCAA College World Series game, Wednesday, June 21, 2017. (AP Photo/Nati Harnik)With the Major League Baseball deadline to sign 2018 draft picks to contracts looming on Friday, the Mariners were able to reach an agreement with Cal Raleigh, their third-round selection out of Florida State, late Thursday evening.

Raleigh, a switch-hitting catcher with power potential, was the Mariners’ only remaining selection, who was expected to sign and hadn’t done so. But they were able to finalize a deal with Raleigh’s agent Scott Boras. General manager Jerry Dipoto confirmed that Raleigh had…