KRIV-TV reported Marshall received a signing bonus of $850,000 plus another $200,000 to use for his college education. The Yankees also gave Marshall an incentive package worth $7,500 that he can earn as he moves through their Minor League system.
"It shows they really like me," Marshall told KRIV. "They showed a lot of interest in me and they think I can make it big one day."
During his senior season at Sterling High School in Baytown, Texas, Marshall compiled a 10-2 record with an ERA of 2.27. He had 116 strikeouts in 89 1/3 innings.
The Yankees essentially gave the sixth-round pick the kind of money normally spent on first-round supplemental picks. But Marshall had already committed to play college baseball at Rice in Houston and would have headed there if he didn't like how things played out in the Draft.
"I tell you right now, if it wasn't the Yankees who drafted me I'd be going to Rice right now." Marshall said. "No question about it. The Yankees have been my team and I am going to take this because three years from now you never know what could happen."
During the Draft, Marshall said he heard from the Atlanta Braves, Cleveland Indians, New York Mets, Boston Red Sox, and Kansas City Royals. But Marshall said all of those teams told him they would like to draft him in the first three rounds and Marshall told them he wasn't interested in signing with them.
"I wasn't for sure how much I was going to get," Marshall said. "Rob [Martin, adviser] called me one night and he told me the number, and I kind of broke down in tears. It's just been a dream. It was unbelievable."
Martin, of ICON Sports, said he is thrilled his company played a role in helping him make his dreams come true.
"We are extremely pleased that Brett will be able to fulfill his dream of playing in pinstripes," Martin told the station. "Brett possesses one of the top arms in the Draft, but more importantly he's got the makeup necessary to succeed at the highest level. We're proud to represent the newest Yankee and couldn't ask for a more talented and dedicated client."
Jim Molony is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.