Dwight Clark, the former receiver of the San Francisco 49ers who famously made "The Catch," has died just over a year after opening up about his battle with ALS. He was 61.

Clark's wife, Kelly, wrote a message on Clark's Twitter account to share the news of his death. 

"I'm heartbroken to tell you that today I lost my best friend and husband," she wrote. "He passed peacefully surrounded by many of the people he loved most."

Clark, a 10th-round pick (249th overall) out of Clemson in 1979, played for the 49ers from 1979-87. During his career, he caught 506 passes for 6,750 yards and 48 touchdowns. In the playoffs, he added 48 receptions, 726 yards and three touchdowns. None were more memorable than his 6-yard touchdown catch in the back of the end zone against the Cowboys in the 1981 NFC Championship Game. Now known as "The Catch," Clark and Joe Montana's touchdown sent the 49ers to Super Bowl XVI, where they defeated the Bengals. In all, Clark won two Super Bowls with the 49ers.

His career, by the numbers:

In May 2017, Clark revealed that he had ALS (amyotrophic lateral sclerosis), which is also known as "Lou Gehrig's disease." After noticing symptoms in September 2015, he said that he was diagnosed with ALS months later. 

"I've been asked if playing football caused this," he wrote in May 2017. "I don't know for sure. But I certainly suspect it did. And I encourage the NFLPA and the NFL to continue working together in their efforts to make the game of football safer, especially as it relates to head trauma.

"What I do know is I have a huge battle in front of me and I'm grateful for the strength and unconditional love from my wife Kelly. She has been my rock. She keeps thinking positive and convinces me each day that we can beat this, as does my daughter Casey and my son Mac. My brother Jeff, his wife Debra and their family also have been unwavering with their love and support."

After Clark's passing was announced, former 49ers owner Eddie DeBartolo mourned Clark's death in a statement, which you can read below (via Rick Stroud of the Tampa Bay Times).

"My heart is broken. Today, I lost my little brother and one of my best friends. I cannot put into words how special Dwight was to me and to everyone his life touched. He was an amazing husband, father, grandfather, brother and a great friend and teammate. He showed tremendous courage and dignity in his battle with ALS and we hope there will soon be a cure for this horrendous disease. I will always remember Dwight the way he was -- larger than life, handsome, charismatic, and the only one who could pull off wearing a fur coat at our Super Bowl parade. He was responsible for one of the most iconic plays in NFL history that began our run of Super Bowl championships, but to me, he will always be an extension of my family. I love him and will miss him terribly. Our hearts and prayers are with his wife Kelly, his children and the entire Clark family."

49ers legend Jerry Rice also shared his condolences. 

As did Roger Craig.

NFL Network's Mike Silver relayed a message from Joe and Jennifer Montana:

In a statement, NFL commissioner Roger Goodell sent his sympathies to the Clark family.

"All of us in the NFL are saddened by the passing of Dwight Clark. Dwight made many memorable contributions on the field as a two-time Super Bowl champion and later as a member of the front office of the 49ers and Browns. He will forever live on in our memories for The Catch, but also for his kind, gentle and courageous spirit. We send our deepest sympathies and love to Dwight's wife, Kelly, his family, teammates, and the many people whose lives he touched, including mine, throughout his career and life."

Finally, the 49ers addressed what they called a "tremendous loss" in their own statement.

"The San Francisco 49ers family has suffered a tremendous loss today with the passing of Dwight Clark. We extend our condolences and prayers to Dwight's wife, Kelly, his family, friends and fans, as we join together to mourn the death of one the most beloved figures in 49ers history. For almost four decades, he served as a charismatic ambassador for our team and the Bay Area. Dwight's personality and his sense of humor endeared him to everyone he came into contact with, even during his most trying times. The strength, perseverance and grace with which he battled ALS will long serve as an inspiration to so many. Dwight will always carry a special place in our hearts and his legacy will live on as we continue to battle this terrible disease."