With the trade deadline behind them and a playoff race heating up, the Boston Red Sox may turn to their own system for late-season relief help.

David Sandlin, a hard-throwing righty acquired from Kansas City in the John Schreiber deal, opened his Triple-A stint with five strong innings as a starter before transitioning into a bullpen role this week.

That shift signals the Red Sox may be preparing him for a potential call-up. He has been clocked at 99 mph, giving Boston a power option that could deepen the relief corps during a postseason push.

“It is tantalizing to imagine Sandlin blowing away big league hitters with his 99 mph fastball during a playoff race in September,” Boston Herald reporter Mac Cerullo wrote Friday.

Another arm to monitor is Kyle Harrison, the 23-year-old left

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