The Oakland Athletics selected Marks in the third round of the 2009 MLB draft, and he signed. Marks spent two years in the A's farm system.
Kansas City Royals
The Royals acquired Marks and Vin Mazzaro from the Athletics for David DeJesus. After the 2012 season, he appeared in the Arizona Fall League and was added to the Royals' 40-man roster.[3] Marks was selected for the Top Prospects Team by the AFL coaches and managers. Marks led the Arizona league with five wins while pitching for the Surprise Saguaros.[4] During the short six-week season he went 5–1 over seven starts and a 2.59 ERA with 22 strikeouts and five walks. Marks spent most of the 2012 regular season with the Northwest Arkansas Naturals of the Double–ATexas League. He posted a 3–5 record with the Naturals with an ERA of 3.80 in 17 starts. Marks' season was interrupted however after a ball hit back to the pitcher fractured his right orbital bone.[4]
On June 6, 2014, Marks was traded to the Oakland Athletics in exchange for cash considerations and was sent to the Triple–A Sacramento River Cats.[8] He made 4 scoreless appearances for Sacramento, logging 2 strikeouts in 3+2⁄3 innings pitched.
Texas Rangers
On June 20, 2014, Marks was claimed off waivers by the Texas Rangers after being outrighted off the A's 40–man roster.[9] In 5 games for the Triple–A Round Rock Express, he logged a 5.06 ERA with 8 strikeouts across 5+1⁄3 innings pitched. Marks was released by the Rangers organization on July 25.[10]
Arizona Diamondbacks
On November 13, 2014, Marks signed a minor league contract with the Arizona Diamondbacks organization.[11] He spent the 2015 campaign with the Triple–A Reno Aces, compiling a 5–9 record and 5.63 ERA with 84 strikeouts over 108+2⁄3 innings pitched.
Tampa Bay Rays
The Tampa Bay Rays signed Marks to a minor league contract on January 19, 2016.[12] On July 16, while with the Durham Bulls of the Triple–A International League, Marks pitched the first complete–game no-hitter in Bulls history.[13] In 25 games (23 starts) for Durham, he compiled a 7–11 record and 3.86 ERA with 127 strikeouts across 140 innings pitched. On September 5, the Rays selected Marks' contract, adding him to their active roster.[14] He made four appearances for the Rays, recording a 1.00 ERA with six strikeouts over nine innings pitched. Marks was removed from the 40–man roster and sent outright to Durham on October 11.[15] He elected free agency following the season on November 7.[16]
On December 22, 2016, Marks re–signed with the Rays organization on a new minor league contract.[17]
Los Angeles Dodgers
On May 9, 2017, Marks was claimed off waivers by the Los Angeles Dodgers.[18] He was designated for assignment on June 8.[19] He accepted his outright assignment to the minors and pitched in 31 games (6 starts) for the Triple-A Oklahoma City Dodgers in 2017. He was 4–3 with a 5.25 ERA.[20] He elected free agency on October 2, 2017.
