The 1904 club was almost as good as the previous team, but due to the surprise emergence of the New York Highlanders , the Boston club found itself in a tight pennant race through the last games of the season. A predecessor to what would become a storied rivalry, this race featured such controversial moves as the trade of Patsy Dougherty to the Highlanders for Bob Unglaub . The climax of the season occurred on the last, dramatic doubleheader at the Highlanders' home stadium, Hilltop Park . In order to win the pennant, the Highlanders needed to win both games. With Jack Chesbro , the Highlanders' 41-game winner, on the mound, and the score tied 2–2 with a man on third in the top of the ninth, a spitball got away from Chesbro and Lou Criger scored the go-ahead run on one of the most famous wild pitches in history.
In 2012, Jerez started 32 games with the Short-Season A Lowell Spinners before missing the remainder of the season with hand injury. Prior to injury, Jerez batted .241 (20-for-83) with five RBI and three stolen bases. Then in 2013, he appeared in 38 games and hit a paltry .138 average in 38 games while playing right and centerfield for Lowell. But Jerez turned his career around after moving from outfield to pitcher in 2014. In that season, he posted a 3–1 record with a ERA and one save coming out of bullpen for the GCL Red Sox. He ended the season at Lowell, going 1–1 with a ERA.