Complex sentence: He posted a 3.97 ERA during the month of July, losing his second game but winning his seventh game and bringing his season record to 7--2 but with a 5.06 ERA for the month.
Split into simpler sentences: He posted a 3.97 ERA during the month of July. He lost his second game, but won his seventh game bringing his season record to 7--2, posting a 5.06 ERA for the month.