Jonathan Arturo Aro (born October 10, 1990) is a Dominican professional baseball pitcher for the Charros de Jalisco of the Mexican League.

He has previously played in Major League Baseball (MLB) for the Boston Red Sox and Seattle Mariners.

He grew up in the Dominican Republic idolizing Red Sox legend and Hall of Famer Pedro Martínez.

[1] Aro made a fast ascent in the Boston Minor League system in a span of four years.

[2] Aro joined the Portland Sea Dogs bullpen in 2015, where he posted a 3–2 record with a 2.28 ERA in eight appearances, striking out 19 and walking eight in 22+1⁄3 innings.

[4] On December 7, 2015, the Red Sox traded Aro and Wade Miley to the Seattle Mariners for Roenis Elías and Carson Smith.

[12] He made 31 appearances split between the Double–A Mississippi Braves and Triple–A Gwinnett Stripers, accumulating a 6–3 record and 3.53 ERA with 40 strikeouts across 63+2⁄3 innings pitched.

[16] Aro made 40 appearances (7 starts) for the Triple-A Salt Lake Bees, working to a 4–7 record and 6.03 ERA with 51 strikeouts and 3 saves in 62+2⁄3 innings pitched.