The back tee area shown has been re-sodded at least once every year since 2007. There are a combination of conditions that favor the tree over the turf and continue to swing even further in the trees favor.
As the tree grows over time, so does the root system that is taking moisture and nutrients from the soil on the tee. The tree's canopy gets bigger with time so the shade shadow it makes does too. The trees behind the 8th tee on the left side of #7 rough are also a big contributor to NO light getting to this area all winter. Between the tree roots and the lack of light, the slightest addition of any stress ( excessive moisture, heat, cold, aeration, sanding, growth regulators, foot traffic, etc.) causes the turf to melt away. We can re-sod again and that will get us into the summer when the turf will check out due to heat stress from the weak root system of the new sod. We could abandon the back tee and set the black markers forward 15 yards, or remove the tree and have and have a decent stand of turf for play. That's the choice we have to make. If it were my decision, I would remove Goliath and let David survive and prosper.