The main appeal of the Midsummer Classic goes beyond the boxscore. We watch the All-Star Game for the fanfare and pure fun.

But you may note that some of the more memorable moments in the recent past haven't had much impact on the game itself. Cal Ripken's homer in his last Midsummer Classic? That was just a solo shot in the third inning. Pedro Martinez's five Ks in '99? Those came in the first two innings of a relatively easy American League win.

What about the performances that really mattered within the context of the final score? Well, of the 6,463 plate appearances in All-Star Game history, only 10 featured a win-probability increase of more than 0.40 -- which is to say, only 10 moments in All-Star Game history have swung the game's outcome by more than 40 percent.

Let's look at the top 10 moments in All-Star Game history, as ranked by WPA. Even when we follow the letter of the law, these are all still pretty special, featuring some of the greatest names the game has ever known (especially at the very top of the list).

10. Hank Aaron (Milwaukee Braves): National League, 1955
Facing: Frank Sullivan (Boston Red Sox)
Situation: Two on, two out, bottom of the 8th, 5-3 AL

Result: Game-tying RBI single
WPA: 0.43

The immortal Hank Aaron played in 21 consecutive All-Star Games from 1955-75, but he never had a more impactful moment than he did in his first All-Star at-bat. Aaron had entered as a pinch-runner earlier in the game and came to the plate with two on and two out in the bottom of the eighth. The National League, which trailed 5-0 just an inning earlier, completed its comeback when Aaron's single plated two runs -- thanks in part to an error by third baseman Randy Jackson.

The legendary 1955 All-Star Game, played in Aaron's home city of Milwaukee, will forever be remembered for Stan Musial's walk-off homer in the 12th -- also off Sullivan. But without Aaron's heroics in the eighth, Musial never would have gotten that chance.

9. Tim Raines (Montreal Expos): National League, 1987
Facing: Jay Howell (Oakland A's)
Situation: Two on, two out, top of the 13th, 0-0 tie

Result: Go-ahead two-run triple
WPA: 0.45

The 1987 All-Star Game in Oakland was a pitchers' duel for the ages. Entering the 13th, 14 different hurlers had combined to keep the game scoreless. Raines finally broke the deadlock with a two-run game-winning triple (featuring yet another silky-smooth call by then-59-year-old announcer Vin Scully). It was classic Raines -- a beautifully compact swing that produced a rocket to the left-center-field gap and a prime showcase of his raw speed to go along with it. Raines, who finished the game 3-for-3, took home the MVP award -- the last Montreal Expo to do so.

8. Brian McCann (Atlanta Braves): National League, 2010
Facing: Matt Thornton (Chicago White Sox)
Situation: Bases loaded, two out, top of the 7th, 1-0 AL

Result: Go-ahead three-run double
WPA: 0.47

For whatever reason, the All-Star Game's results have always been cyclical. In 2010, that cycle was tilted heavily in the AL's favor. The Junior Circuit had won 12 straight (not counting the tie in 2002) and had often done so in dramatic fashion. This time it was Brian McCann's turn to provide the drama. His bases-clearing double in the seventh turned a 1-0 deficit into a 3-1 lead for the NL All-Stars -- the score they'd eventually win by.

7. Fred McGriff (Atlanta Braves): National League, 1994
Facing: Lee Smith (Baltimore Orioles)
Situation: Man on first, one out, bottom of the 9th, 7-5 AL

Result: Game-tying two-run home run
WPA: 0.47

The 1994 season will always be remembered for the World Series that wasn't, but the season-ending strike didn't kick in until August, and the Midsummer Classic that July was one for the ages. The showdown between McGriff and Smith -- two players with legitimate Hall of Fame candidacies -- would prove to be the game's pivotal moment. The Crime Dog launched a two-run home run to tie the game -- the only game-tying homer in the bottom of the ninth in All-Star Game history. An inning later, Moises Alou's double plated Tony Gwynn, and the NL had an 8-7 victory.

6. Mike Schmidt (Philadelphia Phillies): National League, 1981
Facing: Rollie Fingers (Milwaukee Brewers)
Situation: Man on first, one out, top of the 8th, 4-3 AL

Result: Go-ahead two-run home run
WPA: 0.50

In this list's second installment of "All-Star heroes rocking awesome 1980s powder blue uniforms" (Raines being the first), we have Schmidt. The Philly legend's only Midsummer Classic home run could not have come at a better time for the NL, which took a 5-4 lead at the time and eventually won by that score. Watch the video below. Everything about it is awesome -- from Dave Winfield in center, to Mike Easler's fist-pump in that sweet bright-yellow Pirates jersey, to the shot of a bewildered Fingers (and his mustache) in his pinstriped Brewers uni with the iconic "mb" cap. They really did things right in 1981.

5. Gus Bell (Cincinnati Reds): National League, 1954
Facing: Bob Keegan (Chicago White Sox)
Situation: Man on first, two out, top of the 8th, 8-7 AL

Result: Go-ahead two-run home run
WPA: 0.54

Bell is the first of two players to make this list in a losing effort. His two-run homer at Cleveland Stadium in the eighth was all for naught once Larry Doby tied the game in the bottom of the inning. Nellie Fox's two-run single five batters later won the All-Star Game for the AL, snapping a four-game NL winning streak (and a four-game losing streak for Yankees manager Casey Stengel). Bell would later play a pivotal role for the NL All-Star team in 1957 with a 0.35 WPA -- but again his efforts were wasted in a tight AL victory.

4. Cookie Rojas (Kansas City Royals): American League, 1972
Facing: Bill Stoneman (Montreal Expos)
Situation: Man on first, two out, top of the 8th, 2-1 NL
Result: Go-ahead two-run home run
WPA: 0.54

Pretty much the exact situation as the one above: Rojas launched a go-ahead homer off Stoneman (currently the Angels' fill-in general manager in place of Jerry Dipoto) with two out and one on in the eighth. And, like Bell's homer, it was soon erased. Lee May's RBI grounder in the ninth tied the game, and Joe Morgan's walk-off single in the 10th won it for the NL.

3. Hank Blalock (Texas Rangers): American League, 2003
Facing: Eric Gagne (Los Angeles Dodgers)
Situation: Man on second, two outs, bottom of the 8th, 6-5 NL

Result: Go-ahead two-run home run
WPA: 0.56

For the first time, the All-Star Game was more than just an exhibition, after then-Commissioner Bud Selig's decision before the 2003 season to let the game determine home-field advantage in the World Series. And the contest didn't disappoint. Gagne, who didn't blow a save during his entire Cy Young Award-winning 2003 season, left a fastball up in the zone, and the pinch-hitter Blalock crushed it into the right-field seats. The AL took a 7-6 lead, and Keith Foulke closed it out.

2. Michael Young (Texas Rangers): American League, 2006
Facing: Trevor Hoffman (San Diego Padres)
Situation: Men on second and third, two outs, top of the 9th, 2-1 NL

Result: Go-ahead two-run triple
WPA: 0.62

Three years later, it was another Rangers infielder coming through against another vaunted NL closer. With the NL one strike away from its first victory in 10 years, Young asserted the AL's dominance with a two-run, game-winning triple. Hoffman had been cruising when Paul Konerko ignited the two-out rally with a single and Troy Glaus followed with a double. But in the aughts, the Junior Circuit, it seemed, always found a way.

1. Ted Williams (Boston Red Sox): American League, 1941
Facing: Claude Passeau (Chicago Cubs)
Situation: Men on first and third, two outs, bottom of the 9th, 5-4 NL

Result: Walk-off three-run homer
WPA: 0.78

Williams' walk-off shot -- the first in All-Star Game history -- comes in first place on this list, and it's not even remotely close. The AL's win probability stood at just 22 percent when Williams stepped to the plate in the bottom of the ninth. But he crushed Passeau's offering into the right-field seats at legendary Tiger Stadium (then known as Briggs Stadium).

That 1941 season was quite the year for the Splendid Splinter -- and for baseball as a whole. Williams, of course, finished the season with his famous .406 average. And it was Joe Dimaggio -- at the time 48 games into his historic 56-game hitting streak -- who set the stage for Williams with an RBI grounder a batter earlier.

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AJ Cassavell is a reporter for MLB.com. Follow him on Twitter @ajcassavell.