The touchdown reception was the seventh for Jones in eight postseason games.
But the score was made possible with a huge 52-yard catch-and-run by Mohamed Sanu two plays earlier.
The Falcons defense ranks eighth in points allowed at 19.7 points per game, meaning the Rams' high-scoring attack could be faced with a challenge. The sixth-seeded Falcons, who improved to 11-6 with the win, never trailed against the Rams.
Mariota had 205 yards passing and two touchdowns, including the go-ahead 22-yard strike to Eric Decker with six minutes left.
GDP growth at 6.5 pc for FY 2017-18
In the second quarter, the economy showed signs of revival as the GDP growth rate picked up and stood at 6.3 per cent. The Gross Value Added ( GVA ) has been projected to be at 6.1 per cent versus 6.6 in the a year ago .
Los Angeles scored the final 10 points of the second quarter to cut Atlanta's lead to 13-10 at half-time. Still, it's hard to trust a team with absolutely no playoff experience.
Matt Bryant kicked five field goals, including a clutch 56-yarder in the fourth quarter.
The 2nd half was entirely different as Atlanta took time off the clock and the Rams took sacks, penalties, turned the ball over, and then ended up giving up 2 on a safety.
Freeman rushed for 66 yards on 18 carries and had the lone rushing touchdown. After a 3-yard completion on first down and an incomplete pass on second, Goff hit Tyler Higbee in the end zone, but he was blanketed and didn't actually catch it.
Falcons kicker Matt Bryant is on quite a run. And the Falcons would have had poor field position for nearly the entire game had it not been for those recoveries. He was 4-for-4 on Saturday night against the Rams and went 5-for-5 against the Panthers in Week 17.
They'll need their star running back and league MVP candidate in Todd Gurley to be lights and to be an x-factor, especially without their best special teams unit available with the absence of Greg Zuerlein. In the last game he played this season, a Week 16 win for the Rams against the Tennessee Titans in Nashville, Gurley II became just the third player in National Football League history to have at least 100 yards rushing and 150 yards receiving in the same game, joining Ollie Matson (1954) and Herschel Walker (1986). That kind of discrepancy is why he said he puts little stock in whether last season's easy victory at the Los Angeles Coliseum could help the Falcons this week - mainly because the Rams defense has flourished in a new scheme devised by 70-year-old coordinator Wade Phillips.