For the time being, he is helping depressed North Side fans cope with what is shaping up as a lost season, and has his team in position to sweep its first series in a month.Rizzo and the Cubs look to complete a three-game sweep of the Houston Astros on Sunday at Wrigley Field.Rizzo hit his first homer of the season Saturday, a two-run, go-ahead shot to lift Chicago to a 3-2 victory over the Astros. Since being called up Tuesday, the 22-year-old first baseman has two game-winning hits in four contests and the Cubs (28-49) have won three times."It's good to come into a new clubhouse and produce like that and help the team win," Rizzo said. "It's a lot of fun when you do that. It's just good to win."The Cubs haven't done a lot of winning this season -- they're on pace to match the single-season franchise record of 103 losses, set in 1966 -- but a victory Sunday would give them their first three-game winning streak since sweeping San Diego from May 28-30.Rizzo, who had 23 homers in 70 games for Triple-A Iowa, went deep Saturday against fellow left-hander J.A. Happ."That's another thing I worked on hard this year, hitting lefties and I feel comfortable if it's a lefty or righty," he said.He'll get a chance to face another southpaw Sunday with Houston (32-46) giving the ball to Wandy Rodriguez (6-5, 3.52 ERA).Rodriguez permitted five runs and eight hits in 6 2/3 innings of Monday's 8-7, 10-inning loss to San Diego. The Astros, owners of the majors' worst road record at 9-27, have lost seven of Rodriguez's last 10 starts.Rodriguez pitched well in his lone outing of the season against the Cubs on May 23, yielding a solo homer to Reed Johnson and seven other hits over seven innings of a 5-1 victory. He is 2-2 with a 3.06 ERA in 10 starts against Chicago since 2009.The Cubs counter with Travis Wood (2-3, 3.54), who allowed five hits and a walk in seven scoreless innings of Monday's 6-1 win over the New York Mets. The lefty has yielded one run over 13 innings in his last two starts, and had a 2.27 ERA in five June outings.He also pitched well in Houston on May 22, allowing two runs, two hits and two walks in 5 2/3 innings, but was saddled with a 2-1 loss. In four starts against the Astros since the start of last season, Wood is 1-1 with a 1.54 ERA -- his lowest against any team he has faced more than once.Houston second baseman Jose Altuve, who hit a solo homer off Wood in May, could play Sunday after missing six straight games because of a right hamstring injury.First baseman Carlos Lee, who has been the subject of trade rumors involving the Los Angeles Dodgers, could decide his future with the Astros by Sunday. He is 2 for 12 lifetime against Wood.