Here are a few ways to rewrite the title “Red Sox rely on pitching depth, not bullpen games,” with slightly different nuances:

Focusing on Pitching Depth:

• Red Sox: Deep Pitching Staff Is Key
• Red Sox Trust Their Starting Pitching to Carry Them
• Boston’s Pitching Depth Provides Stability
• Red Sox Build Success on Strong Pitching Rotation

Focusing on Avoiding Bullpen Games:

• Red Sox Eschew Bullpen Games, Opt for Length from Starters
• Boston Aims to Limit Bullpen Usage With Deep Pitching
• Red Sox Prioritize Starting Pitchers to Avoid Bullpen Overload
• No Bullpen Games Here: Red Sox Lean on Starting Rotation

Combining Both Aspects:

• Red Sox’ Pitching Depth Allows Them to Avoid Bullpen Reliance
• Strong Starting Pitching Means Fewer Bullpen Games for the Red Sox
• Boston’s Approach: Deep Rotation over Heavy Bullpen Usage

The best option depends on the specific focus you want to emphasize.