I tried to find out via the internet but didn't have any luck. My guess is they got in around 6am-7am?? I figure an hour+ to get onto a plane after the game, an hour to fly there, and an hour to get settled into a hotel.
St. Louis to Dallas is only a 90 minute flight in the same time zone. Fatigue due to playing late and an odd sleep cycle perhaps, but jet lag, no. I am sure they will make BP optional as well. I really do not think it will have that much of an affect on the game. Texas is simply the better team with the better pitcher on the mound tonight.