"Then all of the sudden one of my directors in my office - he got shot and he came hauling into the dugout and fell into my arms and we were both hugging each other", Williams said.
His boss, Representative Roger Williams from Austin, dove for cover in that same dugout.
"All the time (Barth) was bleeding and we were under fire - he was texting", Williams said.
"I was just concerned about staying alive", said Barth. "My prayers are with Zach and everyone hurt in this morning's shooting".
Barth's Facebook page includes pictures of Houston's sports franchises, of him at Baltimore's Camden Yards ballpark in his Astros gear and of him with Longhorns quarterback Vince Young.
"I was pinned down in right field", Barth said.
The charity game between Republicans and Democrats on Thursday night is scheduled to go on.
The Congressional Baseball Game is the pinnacle event of the summer among Washington and Capitol Hill insiders. "It was very scary".
For most people, their first thought upon hearing of the shootings at a baseball practice for Congressional Republicans went something like this: Why are members of Congress on a baseball diamond at 7 a.m. on a weekday?
U.S. Sen. Jeff Flake of Arizona, who was practicing with the House members, described hearing "dozens and dozens and dozens of shots fired".
The congressional staffer wounded in the shooting at a congressional baseball practice Wednesday morning near Washington, D.C., is out of the hospital and recounting his harrowing experience.
Three other people were shot, as well as the gunman, who later died, but things would have been worse if the gunman had figured out how to get past the fence surrounding the field in Alexandria, Virginia, Williams said. "He held me. I held him". "This is America, the greatest country in the world, if you punch us, we will punch you back", Williams said.
"I didn't realize the shooter was probably 20 yards behind me, I hit a ground ball to (House Majority Whip Steve) Scalise and immediately heard a pop".
Meanwhile, two Capitol Police officers who were already at the scene exchanged gunfire to stop the shooter, who ended up hitting one of the officers, as well as Scalise and a lobbyist.
Two Capitol Police officers, identified as special agents David Bailey and Crystal Griner, were wounded while protecting Scalise.
'This person evidently had some issues - I don't think it was a Democratic, Republican issue, I think he just had an issue, ' he said.