Rios had unremarkable career since signing in July 2012 out of Monclova, Mexico, until 2016. In his first shot at full-season ball, the 21-year-old shot out of the gate at low Class A Lansing to earn a promotion to high Class A Dunedin, with a spot in the Futures Game interrupting his season. He gave up a home run to Orioles top prospect Chance Sisco in San Diego and struggled a bit down the stretch as he tired while pitching more than 120 innings. Rios had always impressed club officials with his ability to spin a breaking ball, and he throws both a curveball and a slider that are both at least solid-average, with the curve at times giving him an above-average pitch. His fastball also is average, having reached 96-97 mph but usually sitting 91-92. He learned to pitch off it more in 2016 and improved his fastball command as a result, throwing it more and learning to maintain his compact delivery with a three-quarters release point. His below-average changeup hasn't hindered him so far against lefthanded hitters. Rios lacks prototype physicality but has a chance to be a four-pitch starter with good control, making him a back-end rotation option. He should reach Double-A in 2017.
Career Transactions
Sultanes de Monterrey placed RHP Francisco Rios on the reserve list.
Tigres de Quintana Roo placed RHP Francisco Rios on the reserve list.
Acereros del Norte traded RHP Francisco Rios to Tigres de Quintana Roo.
Acereros del Norte traded RHP Francisco Rios to Tigres de Quintana Roo.
RHP Francisco Rios assigned to Acereros del Norte.
Acereros del Norte activated RHP Francisco Rios.
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