Early minor league career

After signing with the White Sox, he was assigned directly to Double-A Knoxville, skipping over the lower minor league levels. He appeared in eleven games for Knoxville, 10 as a starting pitcher, finishing with a 4–2 record and an ERA of 4.24. He began the 1977 season in Knoxville, but was promoted to the Triple-A Iowa Oaks after improving to a 9–7 record and 2.53 ERA in 22 games. His introduction to the highest minor league level was a rough one, however, as his ERA ballooned to 8.71 in nine starts, of which he won only one.

1978: First taste of the majors

In 1978, Wortham opened the season in Iowa. However, when starting pitcher Ken Kravec got off to a rough start, he was sent to the minors, and Wortham was called up to replace him. He made his debut on May 3 against the Milwaukee Brewers, and he pitched 6.2 innings and gave up 3 runs in a 4–0 loss.^[3] In his next start, he beat the Minnesota Twins, pitching 8 innings and giving up 2 runs on 9 hits.^[3] His next outing found him giving up 10 hits in just 4.1 innings, and he was returned to the minors, with Kravec returning to the majors.^[3]

Wortham spent most of the rest of the season in Iowa, and was recalled in September when the rosters expanded. In five September starts, Wortham went 2–0 with a 2.70 ERA, lowering his overall ERA for the season to 3.02.^[3] He also pitched his first two major league complete games. Wortham was seen as a future star.

1979: Taking a regular turn

In 1979, Wortham came out of spring training as the White Sox' number three starter. Although he did not have a spectacular year, he had a solid first full season in the major leagues. He won a career-high 14 games, but his ERA was a below-average 4.90, he was in the top ten in the league in losses with 14, and he finished fourth in the league in walks allowed with 100. However, he also finished 8th in the league in strikeouts per 9 innings pitched, and it appeared that he had solidified his position as a dependable starting pitcher.

1980: A step backward

Wortham was moved to the bullpen to start the 1980 season, where he was used as a long reliever. He got off to an impressive start, as in his first three outings of the year, he pitched at least four innings, giving up no runs and a combined four hits in 12.2 innings while picking up a pair of wins.^[4] However, as April ended, he had a bad outing, giving up five runs in two innings, followed shortly by giving up six runs without recording an out on May 4.

Wortham was moved back to the rotation, and his first start of 1980 was excellent, as he pitched seven shutout innings against the Kansas City Royals to pick up his third win of the year. However, he gave up four runs in 4.2 innings in his next start, and he went back to the bullpen. The rest of the season went much the same, as he would have good and bad outings, but more bad than good, winding up with a 5.97 ERA and a record of 4–7. After the season, the White Sox traded him to the Montreal Expos for second baseman Tony Bernazard.

Back to the minors: Control problems

Wortham was assigned by the Expos to the Triple-A Denver Bears, where he struggled with wildness. He went 5–5 for Denver in 18 games with a 4.79 ERA, and was even worse in a brief demotion to the Double-A Memphis Chicks, where he posted an 8.00 ERA in 5 games. More alarming, however, was that he walked a combined 99 batters in just 95 innings, including 28 in 18 innings in Memphis.

Wortham went to spring training with the Expos in 1982, but was released on April 1. He was signed by the Philadelphia Phillies, and was assigned to the Double-A Reading Phillies to work out his problems. Instead, they were magnified, as he not only posted 58 walks in just 36.2 innings, but he failed to win a game, going 0–5, and his ERA was a bloated 11.54. The Phillies released him during the offseason.

Last appearance

Shortly thereafter, Wortham was signed by the Athletics, whose pitching staff had collapsed after three seasons of abuse by manager Billy Martin. He was started slowly, being assigned to A-ball with the Modesto A's, the first time he had pitched at that lower level. After 14 games, in which he was 2–3 with a 6.75 ERA and 42 walks in 44 innings, he was moved up to the Double-A Albany A's. Even though his record there was even worse, the desperate Athletics summoned him to the major leagues. He made his last appearance in Major League Baseball on July 23, when he entered the game in the 8th inning in relief of Keith Atherton.^[5] He faced four batters, allowing three hits and a walk without retiring a batter. His catcher in that contest was former Longhorn teammate Bob Kearney.