Jim Callis of MLB.com has this tweet and he’s rarely wrong.
Sources are confirming there is an agreement in principle, but no details of the money. The Mariners selected Jackson with the No. 6 pick overall out of Rancho Bernardo High School in San Diego.
Officially, the Mariners had $4,221,295 to use to sign Jackson without losing draft picks by going over the pool limit of around $3.8 million. They will have to pay a 75 percent tax on the amount above the pool limit.
Jackson is represented by Scott Boras and had committed to the University of Oregon.
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Here’s some more video of Jackson