The Undertaker's 30-year career in WWE officially came to an end in November 2020, and during his illustrious career, he has been incredibly loyal to WWE. Moreover, Undertaker is extremely unselfish, and he is willing to elevate other talents, and if it means he has to lose a match, he will do it.

RELATED: The Undertaker's Last 10 WWE Championship Matches, Ranked From Worst To Best

Undertaker has put over the likes of Mr. Kennedy and Vladimir Kozlov, and whilst their careers in WWE didn't pan out the way they were supposed to, Undertaker has shown that he is a team player. While those were matches that arguably needed him to lose, Undertaker has lost many matches in his career, where he would have actually benefitted from winning.

9 Vs. The Great Khali (Judgment Day 2006)

Undertaker v Khali

Any superstar rarely towers over The Undertaker but The Great Khali did just that. At Judgment Day 2006, The Undertaker collided with this unknown behemoth in a surprisingly one-sided affair.

Khali dismantled Undertaker with ease, and Undertaker hardly did anything to make Khali look worried. From this encounter, it was abundantly clear that Khali was not up to scratch to be a main eventer. Hindsight is a wonderful thing, but Khali really should have lost this match, as his deficiencies were painfully obvious from the get-go.

8 Vs. Mr. McMahon (Survivor Series 2003)

Undertaker v McMahon

Mr. McMahon made a point to be a thorn in The Undertaker's side, and he cost Undertaker the WWE Championship at No Mercy 2003. Undertaker picked the stipulation for his high-profile match with McMahon to be a Buried Alive match at Survivor Series 2003.

Undertaker systematically destroyed McMahon and the WWE Chairman even wore the proverbial crimson mask. Undertaker was closing in on a victory but his brother Kane interfered and aided McMahon to pick up a huge win. The Deadman should have won, and Kane could have still interfered afterward and buried Undertaker alive.

7 Vs. Vader (Royal Rumble 1997)

Undertaker v Vader Rumb

Undertaker had a strong 1996 and he was looking to build on his momentum in 1997. The Undertaker clashed with Vader at the 1997 Royal Rumble. Vader was under the tutelage of The Phenom's former manager Paul Bearer, who was hoping that his latest charge could beat Undertaker.

It was a hard-hitting match, but Vader was not being utilized by WWE to be a top star anymore. Vader prevailed, which should have elevated him up the card but it was a meaningless win. Undertaker should have won the match to carry on his rich vein of form, but thankfully it didn't hurt The Deadman.

6 Vs. Edge (One Night Stand 2008)

One Night Stand 2008

Undertaker and Edge's rivalry dominated SmackDown in 2008, and the duo collided over the World Heavyweight Championship. Their encounter at One Night Stand played to Edge's strengths, as it was a TLC match.

RELATED: Every Major Edge vs. The Undertaker Match, Ranked From Worst To Best

There was also an added caveat that if Undertaker failed to recapture the World Heavyweight Championship he would be banished from WWE. Now, it seemed obvious that Undertaker would win but he didn't. He wasn't banished for long and returned at SummerSlam 2008, but it made sense for Undertaker to win since he lost the title for a lousy reason in the first place.

5 Vs. The Rock (No Way Out 2002)

Undertaker v Rock

The Undertaker and The Rock are two iconic figures of the Attitude Era but they rarely crossed paths in high-profile matches. Nevertheless, they had a brief feud in 2002 leading up to WrestleMania X8 season, at the final pit stop, No Way Out.

Undertaker was hellbent on revenge as Rock cost Big Evil the Hardcore Championship by aiding Maven in humiliating Undertaker once again. Their match at No Way Out was solid but Rock prevailed, although Undertaker definitely should have gone over to get some revenge on The People's Champion.

4 Vs. Kane (Hell In A Cell 2010)

Undertaker v Kane

Undertaker and Kane's storied rivalry had been recycled so many times, it began to get tedious. Their final feud in 2010 actually featured the holy grail, which was Kane's World Heavyweight Championship.

RELATED: Hell In A Cell PPV Main Events Ranked From Worst To Best

Kane beat Undertaker cleanly at Night of Champions which was a shock, but they took their feud to the next level inside Hell in a Cell. It was an average match between the two brothers at Hell in a Cell 2010. Paul Bearer turned his back on Undertaker by siding with Kane once again. However, Undertaker should have recaptured the World Heavyweight Title with one final run as champion.

3 Vs. Mabel (King Of The Ring 1995)

Undertaker v Mabel

The 1995 King of the Ring tournament was one of the worst King of the Ring tournaments that WWE staged. The fact that Mabel was getting a push, was seriously concerning. Mabel and Undertaker collided in the quarterfinal stage, and someone like Undertaker or Shawn Michaels should have won the tournament.

Mabel was extremely dangerous to work with, and he wasn't the greatest in-ring competitor either. Mabel upset Undertaker, and he went on to win the King of the Ring tournament. Nonetheless, Undertaker was undoubtedly the safer option to win this tournament instead of Mabel.

2 Vs. Hulk Hogan (This Tuesday In Texas 1991)

Undertaker v Hogan 91

The Undertaker did the unthinkable by capturing the WWE Championship from Hulk Hogan at the 1991 Survivor Series. The Hulkster was virtually unbeatable, and it was a significant moment in Undertaker's career.

They had their rematch six days later at This Tuesday in Texas. This was a decent match but Hogan recaptured the title, handing Undertaker his first pinfall loss in WWE. It's a shame that Undertaker's WWE Title reign lasted just six days, as he certainly deserved the chance to have a longer reign and show what he could do as champion.

1 Vs. Brock Lesnar (WrestleMania XXX)

Undertaker v Lesnar WM 30

The Undertaker walked into WrestleMania XXX with his 21-0 unbeaten streak, and he went toe-to-toe with Brock Lesnar. Unfortunately, The Phenom sustained a concussion early on in the match, which massively hampered the quality.

It was a foregone conclusion by many that Undertaker would prevail and preserve his WrestleMania unbeaten record. However, that was not to be and Lesnar shocked the world by defeating The Deadman with an F-5. Fans were legitimately shocked inside the Mercedes-Benz Superdome, and Lesnar did not need a win of this magnitude to build momentum. The streak should have been broken by someone else who truly needed it.

NEXT: Every Match From WrestleMania 30, Ranked From Worst To Best