Louis Glenn Marson
- Bats Right, Throws Right
- Height 6' 1", Weight 202 lb.
- High School Coronado High School (Scottsdale)
- Debut September 28, 2008
- Final Game April 24, 2013
- Born June 26, 1986 in Scottsdale, AZ USA
Marson was chosen in the 4th round of the 2004 amateur draft by the Philadelphia Phillies. He was the second catcher they chose, following another player who would appear for Team USA within 3 years, Jason Jaramillo. Lou was signed by scout Therron Brockish and debuted with the GCL Phillies that year, hitting .257/.333/.389 in 38 games.
In 2005, Marson remained in short-season ball with the Batavia Muckdogs, batting .245/.329/.391, hitting .351 against southpaws but .228 against right-handers. He led the New York-Penn League by grounding into 12 double plays; he also led the league's backstops with 419 putouts.
Marson played in 2006 for the Lakewood BlueClaws, producing at a .243/.343/.351 clip. His average against left-handers fell all the way to .226. He had 868 putouts to lead South Atlantic League catchers. Lou's stock rose in 2007 when he hit .288/.373/.407 for the Clearwater Threshers though he had some trouble defensively (15 errors, 11 pased balls). He led Florida State League catchers with 748 putouts. Marson split FSL All-Star catching honors with Francisco Cervelli.
Marson has improved further in 2008. After 82 games for the Reading Phillies, he is hitting .321/.442/.422 and is among the Eastern League leaders in average (4th after Scott Campbell, Luke Hughes and Roger Bernadina), first in OBP and first in walks (60). He played for the USA in the 2008 Futures Game, starting at catcher and batting 8th. He ground out against Hector Rondon in the third inning and then was replaced by Taylor Teagarden.
In the 2008 Olympics, Marson split catching duties with Teagarden. Lou hit .308/.438/.308 in Beijing as the USA won Bronze. He drew several walks that led to runs. He also threw out 2 of 3 attempted base-stealers. He made his major league debut on September 28, the season's last day, and was the last player to make his MLB debut that year. He was the Phillies' starting catcher against the Washington Nationals on the day following the Phils clinching the NL East division title. He went 2 for 4 that day and hit his first major league home run off Marco Estrada in an 8-3 win.
Marson became a coach with the Salt Lake Bees in 2017.