I'll try and keep this short.

I've read lots on the subject of ''mad calf attacks'' - background
Came into Triathlon five years ago - runner all my life - ran 2:40 marathon - Comrades in under 7:30 back in the day. Never had a running injury in my life - now 59.
Typical week's training - 4 x cycling (two 2 hours rides/two1 hour) - run 2/3 times 30/40 mins - swim - 4 times a week - only aiming at sprints.

Here lies the problem.
No pain in the calf area when I cycle/swim. Stand alone runs fine.
Last two sprints have ended in me hobbling to the finnish line - approx 1.5 miles into the 5km my right calf spasms to a point where I am unable to run. In the following days it easies then kind of goes away.

I have had the following treatments following race:
Graston - immediate relief (painful but works)
dry needling - also helps

On a daily basis - I roll with a lacrosse ball , foam roller, stim machine etc

I've also tried - calf sleeves (does not seem to make any difference - pickle juice not the magic bullet I had hoped for).

I'm now stuck do I just give up running and stick to cycling?

I would appreciate any feedback on what others who have had this issue have done.

Thanks