I agree with what others are saying here but I will say this:
"...with great power comes great responsibility."
That quote is true in so much of life. How it applies to your situation is this: the harder you throw the more chance of injury. Getting up to 89 means you now have the responsibility to take even more great care of your arm. Make sure you are getting fully warmed up before throwing and before throwing at max effort. Make sure you have sufficient rest and recovery. Make sure you are continuing to monitor throwing mechanics. Make sure you are taking in proper nutrition. All of those things take on greater importance now.
You needn't be worried. But you should be aware of greater responsibility. That arm can take you places. Take care of it!