David Keith Stewart (born February 19, 1957), nicknamed "Smoke", is an American professional baseball executive, pitching coach, sports agent, and former starting pitcher.

After his playing career, he served as a pitching coach for the San Diego Padres, Milwaukee Brewers, and Blue Jays and as an assistant GM.

General managers he has worked under include Sandy Alderson, Kevin Towers, Gord Ash, and Dean Taylor.

He later became a sports agent based in San Diego until the Arizona Diamondbacks hired him as general manager at the end of the 2014 season, a position he held until 2016.

Stewart attended St. Elizabeth High School in Oakland, where he earned All-American honors in both baseball (where he played catcher) and in football (where he was a linebacker and tight end).

[2][3] He was offered 30 college scholarships to play football, but turned them all down to sign with the Los Angeles Dodgers, who selected him in the 16th round of the 1975 Major League Baseball draft.

[4] Despite his impressive season, he lost out on the Midwest League MVP and Top prospect honors to future Hall of Famer Paul Molitor, then with the Burlington Bees.

[4] Stewart made his major league debut on September 22, 1978, pitching two innings in relief against the San Diego Padres.

[10] He made the Dodgers opening day roster[8] and pitched in relief that season, appearing in 32 games with a 2.49 ERA and six saves.

He got his first Major League win in his first appearance of the season, on April 13 against the San Francisco Giants, when he worked two scoreless innings in relief of Bob Welch.

[8] The Dodgers made the split-season playoffs and Stewart saw his first taste of post-season action, being credited as the losing pitcher in the first two games of the Division Series against the Houston Astros.

[16] On July 11, he was part of a play that Dodgers Manager Tommy Lasorda called one of the "craziest" moments he'd ever seen, when three runs scored on a wild pitch.

[17] After finding a weak market for him, the Rangers finally managed to trade Stewart to the Philadelphia Phillies on September 13, 1985, for pitcher Rick Surhoff.

[16] Stewart started two games in the A's four-game sweep of the Boston Red Sox in the 1988 American League Championship Series.

[31] He allowed three runs in eight innings and was in line for the win before Kirk Gibson's walk-off homer off closer Dennis Eckersley gave the game to the Dodgers.

[36] He finished second in the voting for the American League Cy Young Award to Kansas City Royals pitcher Bret Saberhagen.

[46] The A's won their third straight pennant, beating the Boston Red Sox in the American League Championship Series, and Stewart was named the ALCS MVP going 2–0 with a 1.13 ERA.

[60] He said that the A's general manager, Sandy Alderson, was disrespectful of him and all he had done for Oakland, and was insulted that he was accused of disloyalty when he signed with the Blue Jays.

[16] He suffered from a number of injuries during the season but the Blue Jays stuck with him because of his heart and competitiveness, as well as the support he offered to other pitchers on the staff.

[65] In the 1993 World Series against the Philadelphia Phillies, Stewart got the start in game two and struggled, allowing five runs in six innings to take a rare post-season loss.

[70] In 16 starts, he was 3–7 with a 6.89 ERA,[16] prompting the manager to announce publicly that Stewart would move to the bullpen for the first time since 1986 and be replaced in the rotation by Todd van Poppel.

[74] In 1998, he agreed to become the Padres' pitching coach, despite some worry that it would detract from his goal of becoming a GM and some personal conflict between him and team president Larry Lucchino.

Several of the Padres pitchers (including Andy Ashby, Sterling Hitchcock and Joey Hamilton) credited Stewart directly with the improvement of the staff.

[76] Stewart left San Diego after the season and interviewed for assistant GM positions with Oakland and the Florida Marlins.

[77] When the Blue Jays fired pitching coach Rick Langford in the middle of the 2000 season, Stewart moved into the position on July 24, 2000.

He was outspoken about the fact that he felt minorities were being discriminated against in the front office and that the decision by team president Paul Godfrey was racist.

[86][87] On December 4, 2015, the Diamondbacks agreed to a six-year contract with free agent pitcher Zack Greinke worth a total of $206.5 million.

At that time, it held the highest annual average value in MLB, exceeding $34.4 million per year, and was also the largest contract by total value in team history.

[97] After pleading no contest to a lesser charge of soliciting a prostitute, Stewart's judgment was a fine, probation, and a suspended sentence.

[1] In 1994, Stewart and teammate Todd Stottlemyre stood trial for seven days in Hillsborough County, Florida on charges of battery on a law enforcement officer and resisting arrest with violence.