[frankbmd]

No comment on Raymond's tweet take, but

it seems strange to me that a pitched baseball would cause a cardiac arrest in a young athlete. I suspect that Julio may have had some form of congenital heart defect not previously symptomatic or recognized.

Pete Maravich comes to mind, who performed quite well at the professional level, before dying of heart disease in a pick up basketball game in Pasadena, CA in his early forties. I don't think the basketball that hit him on the head in that game was a factor in his demise. Pete did have a cardiac abnormality.

No tweet by the pitcher in this case would have been far more insensitive. Then again I am not a tweeter and am capable of expressing remorse.