On Thursday night, a four-game set involving the NL East and NL Central leaders starts at Wrigley Field as the Nationals (18-8) visit the Cubs (19-6). The Cubs have won six of seven, including the first two games of their midweek series in Pittsburgh by scores of 7-1 and 7-2. The Nationals have won four of five, although they did fall Tuesday night in Kansas City, 7-6. They finish that series Wednesday before heading for the Windy City. Find out more about the updated MLB online betting run lines here.