[4] In 2007, his senior season in high school, Beavan compiled a 9–2 win–loss record, a 0.19 ERA, and 139 strikeouts in 73 innings pitched,[1] allowing only two earned runs in 11 starts.

[11] In his first professional season, Beavan had a 10–6 record and a 2.37 ERA in 23 games started for the Clinton LumberKings of the Class-A Midwest League.

[13] In 2010, Beavan had a 10–5 record and a 2.78 ERA in 17 games started at for Frisco, where he was named the Rangers' Minor League Pitcher of the Month for May.

[14] He received a promotion to the Oklahoma City RedHawks of the Class-AAA Pacific Coast League (PCL).

Soon after the promotion, on July 9, 2010, Beavan was traded to the Seattle Mariners along with Justin Smoak and fellow prospects Matt Lawson and Josh Lueke for Cliff Lee and Mark Lowe.

[15] The Mariners assigned Beavan to the West Tenn Diamond Jaxx of the Class-AA Southern League.

[17] The Seattle Mariners beat the Padres 3–1 with Beavan going 7 innings and giving up 1 earned run on 3 hits.

On May 4, 2017, Beavan signed with the New York Mets on a minor league deal and was assigned to Las Vegas 51s.

In 6 starts split between Las Vegas and the Double–A Binghamton Rumble Ponies, Beavan recorded a 3.79 ERA with 24 strikeouts in 35+2⁄3 innings pitched.

His main off-speed pitch was a curveball in the mid-to-upper 70s, although he also threw a changeup to lefties and a slider to righties (each in the low 80s).