The tech sector is defenseless against the rash of September selling, Jim Cramer told his Mad Money viewers Thursday, as he broadcast live from the Comcast Center in Philadelphia to kick off the NFL season.

As investors struggle to find a reason for the weakness in tech, Cramer said he's seen this pattern before. As the fiscal year comes to an end for money manager, September has historically been the time when money managers lock in their gains before everyone else does. They don't care that Facebook (FB - Get Report) fell another 2.7%, or that Micron Technology (MU - Get Report) shed 9.8%. They only care about about not losing the gains that took them all year to accumulate.

Unlike other sectors, tech doesn't have automatic defenses, like buybacks and dividends, to protect itself, Cramer told viewers. Buybacks and dividends are how stocks like Clorox (CLX - Get Report) and Boeing (BA - Get Report) have largely avoided these selloffs, he added.

But all is not lost in tech. While Facebook and Twitter (TWTR - Get Report) come under additional scrutiny, other names, like Workday (WDAY - Get Report) and Adobe Systems (ADBE - Get Report) have begun to stabilize. Cramer said he's also bullish on healthcare, fintech and even Starbucks (SBUX - Get Report) .

Over on Real Money, Cramer says that unless it switches, the September sell-off continues. Ignore it at your own peril. Get more of his insights with a free trial subscription to Real Money.

And Now, Football

In a special interview, Cramer sat down with Philly's own Brent Celek, former tight end for the Eagles.

Celek said he's very excited for the season opener and even though he won't be on the field, he'll still be the team's biggest cheerleader.

When asked about life after football, Celek said finances are something that players are beginning to pay more attention to, especially as the media highlights more athletes that lose it all after they retire. Celek is a big believer of index funds and had a special spot in his portfolio for Tesla (TSLA - Get Report) , a company he said gets beaten up endlessly in the media.

Celek explained that investing in restaurants taught him the value of real estate and he's since bought and sold homes and is now building a mortgage and title company that's starting to grow. 

Pick Your Winning Players

There is a lot investors can learn from football. That's why Cramer offered up his 2018 fantasy stock portfolio, the best group of diversified companies he could assemble, all working together, in different roles, to score a big win for your portfolio.

For his running backs, Cramer chose Home Depot (HD - Get Report) , Abbott Labs (ABT - Get Report) , Intuitive Surgical (ISRG - Get Report) and Dexcom (DXCM - Get Report) .

As wide receivers, Cramer went with a pair of tech plays, (CRM - Get Report) and Alphabet (GOOGL - Get Report) as his quarterback, Comcast made the cut, while Take-Two Interactive (TTWO - Get Report) and Activision Blizzard (ATVI - Get Report) field in as tight ends.

Playing defense was Clorox (CLX - Get Report) , a long-time Cramer favorite, and as his kickers, Cramer chose Constellation Brands (STZ - Get Report) and Canopy Growth (CGC - Get Report) . 

Executive Decision: Comcast 

In his first "Executive Decision" segment, Cramer sat down with Brian Roberts, chairman and CEO of Comcast (CMCSA - Get Report) , the cable and media giant with shares that are down 10% for the year, trading at just 13 times earnings.

Roberts first commented on last year's Super Bowl win, saying that Philadelphia had been starved for a big win and the Eagles have changed the mood of the entire season.

Turning to the business of Comcast, Roberts said investors are starting to realize, as they did, that cord cutting and streaming video doesn't have to be a bad thing for his company. More streaming means more broadband services, he explained, and Comcast's broadband sales are the best they've seen in 10 years. Comcast is more of a connectivity company than it's ever been.

When asked about the scramble to buy up media content, Roberts said that of course they're interested in bolstering their content portfolio, but that doesn't mean they'll make acquisitions at any price. Sometimes, it makes sense to walk away.

Overall, Roberts said that Comcast is a special company with a culture and teamwork that's second to none.

Cramer and the AAP team say Honeywell (HON - Get Report) is on the right side of many industry trends. Find out what they're telling their investment club members and get in on the conversation with a free trial subscription to Action Alerts PLUS

No-Huddle Offense: Advertising

In his "No-Huddle Offense" segment, Cramer said love it or hate it, social media is still the best place to advertise, and that means those proclaiming the death of online advertising are seriously mistaken.

Cramer said advertisers are targeting millennials, a group that has little brand loyalty and very fickle tastes. These elusive yet lucrative customers love social media, he explained, which is why advertisers don't dare stray from what's working, no matter how badly Facebook, Twitter and Google are behaving. 

Lightning Round

In the Lightning Round, Cramer was bullish on AbbVie (ABBV - Get Report) , TJX Companies (TJX - Get Report) , United Parcel Service (UPS - Get Report) , Advanced Micro Devices (AMD - Get Report) , Nvidia  (NVDA - Get Report) , Bank of America (BAC - Get Report) , JPMorgan Chase (JPM - Get Report) , Citigroup (C - Get Report) and Amgen (AMGN - Get Report) .

Cramer was bearish on Anheuser-Busch InBev (BUD) , Fiat Chrysler (FCAU - Get Report) , Applied Materials (AMAT - Get Report) , Exelixis (EXEL - Get Report) and Endo Pharmaceuticals (ENDP - Get Report) .

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At the time of publication, Cramer's Action Alerts PLUS had a position in HON, FB, CMCSA, ABT, CRM GOOGL, NVDA, JPM, C, AMGN.