How do i airplay mlb from my ipad to my lg tv?

Hello digmac8,

Thanks for asking about AirPlay. This article mentions you need an Apple TV, or AirPlay 2-compatible TV: Use AirPlay to stream video or mirror the screen of your iPhone, iPad, or iPod touch - Apple Support

This list will help you check if your TV is AirPlay 2: AirPlay 2–Enabled TVs and Devices

If other things stream properly and only the MLB app has issues, it may be due to licensing rights as mentioned in the first help article above: "Some video apps might not support AirPlay. If you can’t use AirPlay with a video app, check the App Store on your Apple TV to see if that app is available."

Thanks.