The Astros spoke out after the incident, saying they "do not condone" Marlow's comment.
"We have communicated with the player, who agreed that his tweet was inappropriate and insensitive and has since apologized," the Astros said in a statement. "We also apologize to Ms. Mendoza, who is an outstanding broadcaster that we have had the pleasure of working with this season."
The 23-year-old minor league infielder was drafted to the Houston Astros system in the 29th round in 2015. He split this season between Class A affiliates the Quad Cities River Bandits and the Lancaster Jethawks.