The Mariners have signed Mike Zunino, the No. 3 overall pick in the draft, for $4 million.

Baseball America's College Player of the Year, Zunino led Florida to its third straight College World Series appearance by batting .322/.394/.669 with 19 homers. His plus power is his best tool, and he also has a solid bat and defensive skills.

Zunino's bonus was the third-highest thus far in the 2012 draft but also $1.2 million less than the assigned value for the third choice. The Mariners are now $36,600 over budget for their signings in the first 10 rounds. Seattle's lone unsigned player in that group is eighth-rounder Nick Halamandaris, a California high school first baseman.

The Mariners previously had handed out above-value bonuses to second-rounder Joe DeCarlo ($1.3 million), supplemental third-rounder Tyler Pike ($850,000), fifth-rounder Chris Taylor ($500,000) and sixth-rounder Timmy Lopes ($550,000). Unless Seattle signs eighth-rounder Nick Halamandaris to a below-value deal, it will be subject to a 75 percent tax on its overage ($27,450) under MLB's new draft rules.

View our Mariners draft database here.