The Mariners have signed second-round pick Joe DeCarlo for $1.3 million, making him the first player outside the first and sandwich rounds this year to receive a seven-figure bonus. The assigned value for his No. 64 slot was $806,000.

A shortstop from Garnet Valley HS in Glen Mills, Pa., DeCarlo projects to move to third base as a pro. He has the potential to hit for both power and average while playing solid defense at the hot corner. He had committed to Georgia.