Terrible start to Trevor Bauer's Thanksgiving week ... a tire flew off a semi-truck and smashed up his $300,000 McLaren and the photo is heartbreaking!!
It all went down in Houston, Texas early Wednesday ... where the Cincinnati Reds pitcher's beloved 2016 McLaren 650s was parked at the local McLaren dealership.
We're told the dealership is located next to a highway -- and earlier today, a tire came loose on a semi-truck, flew across 6 lanes of traffic, ricocheted off a wall and smashed through a double-paned glass window before hitting the car!!!
The photo shows the damage to the wall, the glass and car .