High school and college Solís attended
Agua Fria High School in
Avondale, Arizona. Playing for the school's baseball team, he had a 7–3
win–loss record and a 1.77
earned run average (ERA) with 117
strikeouts and 29
walks with 25
hits allowed in
innings pitched in his sophomore year. In his junior year, he had a 4–4 record and a 1.93 ERA, and recorded 87 strikeouts with 23 walks and 45 hits in innings. While in his junior year, he competed in the
American Amateur Baseball Congress and won the 2006 Connie Mack World Series. As a senior, Solís had an 8–2 record, a 2.40 ERA, and 98 strikeouts to 43 hits and 23 walks in innings. He was again named West Valley's High School Baseball Co-Player of the Year, along with Cody Cress. Expected to pitch more in 2009 due to San Diego teammate
Brian Matusz signing a professional contract, Solís instead injured his back while
weightlifting. He returned as a
redshirt sophomore in 2010, and had a 9–2 record and a 3.42 ERA with 92 strikeouts and 82
hits allowed in 92
innings pitched. He was named All-
West Coast Conference. and Solís received a $1 million
signing bonus to sign with Washington. Before the 2012 season,
MLB.com rated Solís as the 86th-best prospect in baseball. He had
Tommy John surgery to repair the UCL in March 2012 and missed the 2012 season. and was assigned to the AFL after the 2013 season. He was shut down in June 2014 with discomfort in his elbow after making one start for the
Harrisburg Senators of the
Class AA Eastern League. Solís began the
2015 season with Harrisburg. He was promoted to the major leagues on April 29, and made his major league debut the next day. Solís started the
2016 season at
Triple-A Syracuse, but he was called up April 27 after reliever
Matt Belisle was injured and placed on the disabled list. Solís himself spent time on the disabled list in 2016, briefly being listed with knee soreness on July 17 and then being sidelined with left shoulder inflammation from August 17 to September 26. Solís was regarded as having what an
SB Nation writer called "something of a breakout season" in 2016, pitching to a 2.41 ERA in 41 innings and proving equally effective against hitters on both sides of the plate. He appeared in all five games of the
2016 National League Division Series against the
Los Angeles Dodgers. Injuries once again plagued Solís in the Nationals'
2017 season. Although he started the year in the major league bullpen, he landed on the disabled list on April 19 with left elbow inflammation and struggled after being activated July 1 after an extended rehabilitation stint in the minor leagues. Solís was optioned back to Syracuse over the
All-Star Break after several poor performances in relief. During the
2018 season, Solís appeared in a career-high 56 games for the Nationals, primarily as a situational left-handed pitcher against left-handed batters. He had difficulty against left-handed batters during the year; they had a .993
on-base plus slugging percentage in 88 match-ups against him, hitting five home runs, two doubles, and two triples. and finished the season with a record of 1–2 partly because his success against left-handed batters prior to 2018 suggested that he might again succeed against them in the future.
San Diego Padres On March 11, 2019, Solis signed a minor league deal with the
San Diego Padres. On October 16, the BayStars announced that the team would not sign Solís for the next season. On December 2, he became a free agent.
Acereros de Monclova On April 9, 2021, Solís signed with the
Acereros de Monclova of the
Mexican League. He was on the
Mexico national baseball team roster for the
2020 Summer Olympics (in July 2021), but a positive
COVID-19 result disqualified him. In 25 appearances for Monclova, Solís compiled a 3-0 record and 2.57 ERA with 24 strikeouts over 21 innings of work. He became a free agent following the season. ==Personal life==