Born in the St. Louis suburb of Maplewood, Missouri, he was the elder brother of Paul Christman, who would become a quarterback in the National Football League during the 1940s and, later, one of the most accomplished color commentators on NFL and American Football League telecasts of the 1960s. Mark Christman threw and batted right-handed, stood tall and weighed during his baseball career. After graduating from high school in Maplewood, he failed a tryout for the powerhouse St. Louis Cardinals in 1932, but he continued to play semi-professional baseball and was eventually signed to a contract by the Detroit Tigers in 1934; coincidentally, the Cardinals and Tigers would battle each other in the hard-fought 1934 World Series. He began his pro career in the Tigers' farm system that season and made the 1938 Detroit roster after batting.289 in the Texas League. He started 65 games at third base and another 22 at shortstop during his rookie season. The following May, he was one of six Detroit players shipped to the Browns, St. Louis' downtrodden American League team, for pitcherBobo Newsom and three others; Newsom would pitch the Tigers to the 1940 AL championship, while Christman batted only.216 for the Browns and would spend 1940–1942 back in the minor leagues.
With St. Louis Browns
As World War II raged and hundreds of players were called to military service, Christman—although not classified 4–F—was exempt from the draft and was called back to the talent-starved Browns in. After playing most of that season as a utility infielder, he replaced the traded Harlond Clift as the team's regular third baseman in mid-August. In, he started 145 of the Browns' 154 regular-season games at third base. Although he hit only six home runs, his 148 hits and 83 runs batted in were second on the club to slugging shortstop Vern Stephens, as he helped lead the Browns to their only American League pennant, prevailing by one game over the Tigers. In the 1944 World Series, the Browns faced their tenants at Sportsman's Park, the Cardinals, who had won their third straight National League championship and were gunning for their second World Series triumph in three seasons. The Browns, considered "sentimental favorites," won Games 1 and 3 to forge a two games-to-one lead. But, stymied by the Cardinals' superior pitching, they lost the Series' final three games to deny them what would have been their only world title. Christman struggled along with the other Browns' hitters; he collected only two singles in 22 at bats, with no bases on balls and six strikeouts; in the field, he made one error in 13 total chances. Christman played in only 78 games in, the last wartime season, after missing much of the action during April and May. He did hit a career-high.277 and held the regular third-base job in, as MLB players flooded back from military service, hitting.258 in 128 games. But, on the eve of the season, the 33-year-old veteran was sold to the Washington Senators, where he finished his big-league tenure as the starting third baseman, regular shortstop and utility infielder. His playing career continued in the minor leagues through 1953, where he was a player-manager. Later, he scouted for the New York Yankees. In his nine MLB seasons Christman played in 911 games and had 3,081 at-bats, 294 runs scored, 781 hits, 113 doubles, 23 triples, 19 home runs, 348 RBI, 17 stolen bases, 219 walks,.253 batting average,.306 on-base percentage,.324 slugging percentage, 997 total bases, and 37 sacrifice hits. He died in St. Louis at the age of 62.
