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Home » 5 Rob McElhenney Weight Gain Tactics to Avoid at All Costs

5 Rob McElhenney Weight Gain Tactics to Avoid at All Costs

Updated December 12, 2025 by Rich

This Rob McElhenney weight gain strategy will teach you how to get ripped

In 2011, Rob McElhenney, co-creator and star of Its Always Sunny in Philadelphia, decided to look as ugly as possible for his role on his show for laughs.

He met this objective when he gained 50 pounds in less than 3 months for Sunny in Philadelphia’s seventh season.

Co-star and Executive Producer Charlie Day told TV Guide Magazine that Rob transforming into Fat Mac made sense because “the reality of five people in a dive bar in Philadelphia is that they won’t get better abs.”

rob mcelhenney weight gain Image Credit Fandom.com

Rob McElhinney weight gain donut tactic – Image Credit Fandom.com

Here are 5 revolting Rob McElhenney weight gain tactics that you should stop immediately if you need to lose weight ¹:

#1. Two Big Macs a Day

McElhenney had two Big Macs every day, which added up to a total of:

  • 1,080 calories
  • 56 grams of fat, 86% of the RDV
  • 20 grams of saturated fat, 100 percent of daily intake any human being should consume of saturated fat (on a 2000 calorie per day diet)
  • 1,880 mg of sodium, 80% of the limit for sodium

And this was only breakfast!

#2. Krispy Kreme Donuts

Every morning, McElhenney had four Krispy Kreme Donuts, as he told Dax Sheppard of the Armchair Expert podcast¹.

  • 760 calories
  • 44 grams of fat, 64% RDV
  • 20 grams of saturated fat, 100 percent of the DV, so he is already way over the limit
  • 340 mg of sodium, 12% of the Recommended Daily Value for sodium

#3. Melted Ice Cream for Lunch

By the afternoon,  Mac already had close to 2,000 calories, but that was not enough.

So, he added melted ice cream to the mix.

Even though we do not know which brand and flavor McElhenney used, one of the most popular brands of ice cream in America is Ben & Jerry’s.

Let’s assume Fat Mac drank a pint a day of Vanilla Heath Bar Crunch:

  • 1,120 calories
  • 68 grams of fat, 104% DV
  • 40 grams of saturated fat, 200% RDV
  • Cholesterol, 260 mg, 88% of the total amount of cholesterol you should have in a day

 

 
 
 
 
 
View this post on Instagram
 
 
 
 
 
 
 
 
 

 

To lose weight – lift weights six times a week, stop drinking alcohol, don’t eat anything after 7pm, don’t eat any carbs or sugar at all, get the personal trainer from Magic Mike, sleep nine hours a night, run three miles a day, and have a studio pay for the whole thing over six months.

A post shared by RobMcElhenney (@robmcelhenney) on Sep 5, 2018 at 8:57pm PDT

#4. Drink A lot of Wine

#5. Eat Late at Night

Specifically cottage cheese at 2 in the morning.

And presto, you too can gain 60 pounds over 3 months or 30 years.

Rob McElhenney Weight Gain – Final Thoughts

“First, I tried to gain weight with chicken breast and rice and vegetables.

But when you’re four months in it and you have to muscle down 1,000 calories for the third time or fourth time in a day and you have to either eat three chicken breasts, two cups of rice and two cups of vegetables — or one Big Mac — you start to see the Big Mac and realize it’s a lot easier to get down …

And then every once in a while I would eat three donuts.

And every day one of my meals was a high-calorie protein shake.³”

‘Success leaves clues’ – How did Rob McElhenney gain the weight for Always Sunny in Philadelphia?

From above you can see one simple answer – processed food.

To gain weight, all you have to do is eat a lot of processed food, and before you know it, you will morph into Fat Mac, too!

Unlike a sitcom, struggling with obesity is not a laughing matter, especially if you don’t have a studio that will pay for your body transformation.

But, no worries, because you do not need more than:

  • The world’s simplest way to reach your ideal weight – this practical plan to lose 20 pounds in 3 months and
  • a training plan that includes squats, deadlifts, and bench presses – 3×5 Workout Plan: The Only Strength Training Program You Will Ever Need
  • Or if you do not have time, then at the minimum:
    • Walk 30 minutes a day to prevent sitting disease ( or go rucking 3 times a week)
    • Do 100 pushups a day at home, and
    • If you have time for one strength training exercise, let it be the deadlift once or twice a week

What’s Next

Now that you know how Fat Mac packed on the pounds, you might want to know how he chiseled his physique.

If yes, see this article: 7 Best Rob McElhenney Workout Routine Tips to Get Ripped!

Related Posts:

  • 11 Getting Fit at 50 Before and After Photo
  • Lean Bulk Macros Guide: How to Build Muscle Without Getting Fat
  • 20 Greatest Benefits of Squats – King of Free Weight Training
  • 6-Week Deadlift Strength Training at Home Program to Get Ripped
  • How to Weight Lift for Weight Loss: A Plan That Works

Footnotes:

¹ Rob’s Body Transformation

² America’s 7 Most Popular Ice Cream Brands – https://dodocookiedough.com/popular-ice-cream-brands/

³ How Fat Mac Got Fat – The Wrap

Filed Under: Diet and Weight Loss

About The Author

Rich - Fitness Over 50 NASM Certified Personal Trainer Rich is a NASM-CPT and Integrative Nutrition Health Coach. At 55, he lost 75 pounds in 6 months, and discovered if you change your body, you can change your life. Ready to reignite your fitness? Start Your Body Transformation Journey Here. | See all articles by Rich

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