Adam Dunn was the Reds' Opening Day home run king with five - two in 2005, one in 2006 and two in 2007 (shown here). In fact, three ex-Reds share the record for Opening Day homers. Click on to see who the others are. (Thomas E. Witte/Getty Images)
Hank Aaron belts his 714th home run - a three-run shot off Reds starter Jack Billingham in the first inning - to tie Babe Ruth's record on Opening Day, April 3, 1974 at Riverfront Stadium.
Hank Aaron's teammates mob him at home plate after Aaron tied Babe Ruth's record with his 714th homer on Opening Day, April 4, 1974, at Riverfront Stadium.
Mayor Mark Mallory threw out the worst Opening Day first pitch ever in 2007, but he became a national celebrity. Watch it at https://www.youtube.com/watch?v=E5DwLQoGfDI
In 2011, Ramon Hernandez capped one of the most exciting Opening Day games with a three-run, walk-off home run to beat the Brewers, 7-6. (Joe Robbins/Getty Images)
Elephants, camels and the Budweiser Clydesdales were part of the animal show that Marge Schott incorporated into Opening Day festivities. In 1996, Sparky Anderson takes the ball from an elephant. (Photo: Reds)
Ryan Ludwick dislocated his shoulder sliding into third base on Opening Day 2013. He missed most of the season, playing in just 38 games.
A sellout crowd of 42,343 had great expectations when Great American Ball Park opened on March 31, 2003, but the Reds laid an egg, losing 10-1 to the Pirates. Poor starter Jimmy Haynes was out of baseball a year later. (Jonathan Daniel/Getty Images).
Joe Randa is mobbed by teammates after hitting a walk-off home run against the New York Mets in the ninth inning on April 4, 2005, at Great American Ballpark . The Reds won 7-6.
Why is Reds manager Ray Knight holding a fruit basket in 1996? It's part of the Opening Day tradition started by Findlay Market proprietors years ago and continued recently by the Rosie Reds.
Mario Soto holds Reds' records for most Opening Day starts (six - 1982-86, '88) and most wins (four - 1983-86). He was 4-1 on Opening Day. (Photo: Reds)
With Great American Ball Park under construction, the Reds held their last Opening Day in Cinergy Field (nee Riverfront Stadium) in 2002. The Reds beat the Cubs, 5-4, when Barry Larkin dashed home on a short fly to right in the ninth.
Tragedy struck Opening Day in 1996 when home plate umpire John McShery collapsed during the first inning and died. The game was postponed and played the next day. After a moment of silence, the Reds beat the Expos 4-1. (Photo: Getty Images).
Ken Griffey, Jr., makes his Reds debut on Opening Day, 2000.
Presidents George W. Bush, who threw out the first pitch in 2006, and George H.W. Bush, the pitcher in 2003, officiated at two of the Reds' worst Opening Day losses ever, 16-7 to the Cubs and 10-1 to the Pirates. (Thomas E. Witte/Getty Images)
Four inches of snow fell on Opening Day morning, April 6, 1977, but the grounds crew used snowblowers and shovels and cleaned off the AstroTurf in time for the first pitch at 2:34 p.m. It was 38 degrees. The Reds beat the Padres, 5-3.
The 1978 opener had it all - a triple play, three rain delays, 20 runs and 28 hits - but Joe Morgan stole the show. He had a homer, two doubles, five RBI and a stolen base in the Reds' 11-9 win over the Astros. (Photo: Reds).
Sometimes Opening Day makes unlikely heroes, like Frank Pastore in 1980. The 22-year-old righthander was a late fill-in for Tom Seaver, who got sick. Pastore pitched a three-hitter and shut out the Braves 9-0.
Frank Robinson is one of the answers to the question: Which three ex-Reds share the major-league record for Opening Day home runs? Robby, Ken Griffey Jr. and Adam Dunn have 8. Robby hit 3 with the Reds and Dunn 5. Griffey hit his 8 with Seattle.
Johnny Cueto pitched seven shutout innings to beat the Marlins, 4-0, on April 5, 2012, at Great American Ball Park. Cueto allowed only three hits. Aroldis Chapman and Sean Marshall pitched 1-2-3 innings with two strikeouts. (Andy Lyons/Getty Images)
Call Sean Casey "Mr. Opening Day." In 1998, the Reds announced Dave Burba would be their Opening Day pitcher, then they traded Burba on the day before the game to get Casey. Casey batted .385 in seven Reds openers with two HRs. (Photo: Reds)
The 2012 opener begins with a flourish on Thursday, April 5. The game had been scheduled for April 6 - Good Friday - but MLB agreed to change it after Reds fans howled. Johnny Cueto shut out the Marlins, 4-0. (Photo: Andy Lyons/Getty Images).
Don Gullett pitched one of the most exciting Reds' victories on Opening Day in 1975. Battling Dodgers ace Don Sutton, Gullett held L.A. to one run in 9 2/3 innings. The Reds won 2-1 in 14 innings - the longest opener in Cincinnati. (Photo: Reds).
Reds fans have to be prepared for any kind of weather on Opening Day. In 1985, there were two snow delays lasting almost an hour. The 1966 opener was played on the road after three rainouts here. In 2012, it was 82 degrees.
Sparky Anderson the Reds manager had a 6-3 record on Opening Day. Sparky Anderson the major-league player was 1-0. In his only big-league season (1959), the Phils infielder singled in the winning run to beat the Reds' Don Newcombe, 2-1. (Photo: Reds)
Pete Rose played 18 Opening Day games for the Reds, starting with his rookie season in 1963 (0-for-3, walk, run in 5-2 win over Pirates) and finishing in 1985 (2-for-3, run, 3 RBI in 4-1 win over Expos). (Rick Stewart/Getty Images)
Tom Seaver started three Reds openers and didn't win any. He was 0-1 with a 17.32 ERA in 1978-79. In 1981, he led the Phils 1-0 in the eighth but three singles - one by Pete Rose - tied it. Tom Hume pitched the ninth and won 3-2. (Photo: Reds).
Tom Browning had the yips in his first Opening Day start in 1987. "I struck the first batter out. People started cheering, and then my legs just disappeared." He gave up five runs in three innings, but the Reds rallied to beat the Expos 11-5.
Lou Piniella made Reds history when he succeeded Pete Rose as manager in 1990. Because labor problems delayed the season a month, the Reds opened in Houston on April 9 and won, 8-4. They started 9-0 and went wire-to-wire, winning the World Series.
Vice President Dick Cheney throws out the first pitch in 2004. The Reds lost to the Cubs 7-4. (Andy Lyons/Getty Images)
A fan holds an Opening Day ticket before the Reds played the Angels in 2013. The Angels won 3-1. (Photo by Andy Lyons/Getty Images)