Even a casual fan can appreciate a tremendous baseball rivalry. The Chicago Cubs and St. Louis Cardinals have emerged as a strong one in recent years, and there's always excitement involved when the San Francisco Giants take on the Los Angeles Dodgers. [ Join a Yahoo Daily Fantasy Baseball contest now ] That said, you just can't beat an old classic. The New York Yankees and the Boston Red Sox have had one of baseball's best rivalries since the infamous Babe Ruth trade back in 1935. Even when one of the teams experiences a down year, watching New York and Boston go at it is usually a tremendous, drama-filled experience. Thanks to Yahoo Sports' Free MLB Game of the Day, you'll have the opportunity to watch those two clubs battle it out right here on Yahoo Sports on May 6. Throughout the entire season, we'll be streaming one MLB game per day on the site. It's an opportunity for fans to see the best teams and the biggest stars. The best part: It's completely free! Games can be streamed at Yahoo's Sports Home , MLB index and video home . Yankees-Red Sox is just one of the highlights we'll be bringing fans during May. A full schedule of games for the month is listed below: