Compilation of fly balls hitting the catwalks at Tropicana Field. The four catwalks are part of the dome's support structure. The stadium was built with cable-stayed technology similar to that of the defunct Georgia Dome. It also supports the lighting and speaker systems. Because the dome is tilted toward the outfield, the catwalks are lower in the outfield. The catwalks are lettered, with the highest inner ring being the A Ring, out to the farthest and lowest, the D Ring. The A Ring is entirely in play, while the B, C, and D Rings have yellow posts bolted to them to delineate the relative position of the foul lines. Any ball touching the A Ring, or the in-play portion of the B Ring, can drop for a hit or be caught for an out. The C and D Rings are out of play; if they are struck between the foul poles, then the ball is ruled a home run. On October 4, 2010, Major League Baseball approved a change in the ground rules for the A and B rings, making it so that a batted ball striking either of the two rings was automatically ruled a dead ball, regardless of whether the ball strikes in fair or foul territory. The rules pertaining to the C and D rings remained the same. This change lasted for just the 2010 postseason. On July 17, 2011, during a nationally televised game against the Red Sox, Rays batter Sean Rodriguez hit a high foul popup that shattered a lightbulb on a catwalk. Pieces of the broken bulb fell to the turf near the third base coach's box. After a quick cleaning delay in which the Tropicana Field PA system played the theme to The Natural (a 1984 film that prominently features a hit baseball striking and shattering a stadium light fixture), the game resumed. (2:01) In video: Another ceiling-related incident came in June 2018, when New York Yankees outfielder Clint Frazier's 9th-inning fly ball bounced off a speaker hanging from the B ring and was caught by Rays shortstop Adeiny Hechavarria for an out. Some suggest that the ball would have traveled far enough for a home run, which would have broken a 6–6 tie. The Rays won the game in extra innings with a walk-off home run. https://en.wikipedia.org/wiki/Tropicana_Field