A shot at revenge and a match-up against a first place team is all the excitement needed to make the next Sacramento River Cats homestand a must see event.   The Cats will host two teams from the American Northern Division, starting with a rematch of last year’s PCL championship with the Memphis Redbirds, and four games against the Nashville Sounds, who come into the series first in their division with a 23-15 record. Memphis will be the first series from May 20-23, and Nashville will be the second series from May 24-27.   With a record of 17-23, the River Cats are facing an uphill battle in the Pacific Southern Division, tied for third with the Las Vegas 51s. Their second homestand a