He was recalled by the Cubs on July 12, 2007, but only had 1 hit in 7 at-bats. In September 2007, when the Cubs expanded their roster, he joined the team again.
The passage describes a player being recalled by the Chicago Cubs twice during a specific period. The first recall occurred in July 2007, but he only had one hit in seven at-bats. Later, in September 2007, when the Cubs expanded their roster, he rejoined the team.