Carlos Silva was cruising on his way to his best season in years when an irregular heartbeat brought him down in August. He came back just in time to suffer an elbow strain in early September, and now it looks like his season is over.

The right-hander has not pitched since Sept. 7 and missed his next scheduled start five days later because of a right elbow strain. He’s simply running out of time.

“The thought of him getting built up in time for the last series — you never rule anything out — but it would be very tough,” Cubs manager Mike Quade said Thursday. “My way of thinking is to just monitor him carefully. To rush somebody back for no apparent reason as opposed to getting him completely healthy would not make much sense to me. We’ll continue his throwing program.”

If Silva’s season is over, he’ll finish 10-6 with a 4.22 ERA. Certainly a vast improvement over his past two seasons and much better than any Cubs fans expected, but it’s a disappointment given how well he started the season.