Varsho, 30, is slashing .243/.307/.375 with seven home runs, 26 RBI, and nine stolen bases through 99 games this season. Houston (58-55) is looking to add a veteran bat to the lineup as they have now won nine of their last 10 games and aim to run away with the American League West pennant.
Arighetti, 26, is tossing a 4.60 ERA through 17 starts in his third year. The former sixth-round pick has 87 strikeouts in 88 innings, giving up 68 hits and 50 walks.