Solis' professional career extended from 1952 through 1963, but the 1958 campaign was his most noteworthy. Starting the year with the Fort Worth Cats, Solis fashioned a 15–2 won–lost record and a 2.44 earned run average in the Double-A Texas League[1] then was called up to the Cubs in July. In his MLB debut on July 16 at Wrigley Field, Solis gave up nine hits and five runs, all earned, in 6⅓ innings against the Cincinnati Redlegs, but gained a no-decision as the Cubs came back to win the game, 7–5.[2] Solis would make three other starting pitcher assignments, but his finest outings came in relief. On July 26, he relieved starter Dick Drott in the third inning and then worked 6⅓ scoreless frames to earn his first MLB victory over the Milwaukee Braves, the defending world champions.[3] Then, on August 10, Solis turned in another lengthy relief effort, replacing John Briggs in the first inning in a game against the St. Louis Cardinals and lasting the final 8⅔ innings while giving up only two earned runs to gain another victory. He was aided by four double plays in that contest.[4]