On Monday the free MLB System play is on the St.Louis Cardinals. Game 903 at 9:40 eastern. The Cardinals fit a tight system here tonight, that plays on road favorites that were a home favorite of -200 or more in their previous game, vs certain opponents that are off a road loss and scored 4 or less runs on 10+ hits. The Cardinals are off a come back win vs the Mets last night as a heavy favorite, while Arizona lost 5-3 on the road vs the Padres. St.Louis has a nice pitching edge here as well. They send B.Penny to the hill and he has been lights out this year in his early outings allowing just 1 earned run in 14 innings of work. Even better is his record vs Arizona. Penny is 9-3 with a solid 1.96 era vs the Diamondbacks. In his last start vs Arizona he went the distance without allowing any earned runs. Arizona has R.Lopez going tonight and he has struggled in 3 career starts vs the Cardinals with a 6.35 era. Look for the Cardinals to take game 1 tonight. For the MLB play take the St.Louis Cardinals. RV