Details surrounding his death are unclear. Major League Baseball has cancelled Monday night's game as a result.
The Angels issued a statement saying, "It is with great sorrow that we report Tyler Skaggs passed away earlier today in Texas."
"Tyler has, and always will be, an important part of the Angels Family. Our thoughts and prayers are with his wife Carli and his entire family during this devastating time."
Phillies superstar Bryce Harper has shared his condolences ... saying, "By far the nastiest prep arm I ever faced. My thoughts and prayers go out to Tyler's family! Gone too soon!"
Cleveland Indians ace Trevor Bauer added ... "We came up together. We won together. We laughed and celebrated together. Today, we all lose and mourn together."
"Your memory, your love for life, everything that made you, you, will live forever in the hearts and minds of those who knew you. Rest In Peace brother. We love you."
Angels superstar Mike Trout spoke out about his teammate, saying "Words cannot express the deep sadness we feel right now. Our thoughts and prayers are with Carli and their families."
"Remembering him as a great teammate, friend, and person who will forever remain in our hearts... we love you, 45."
Skaggs posted a picture with his teammates on Sunday after touching down in Texas for the Angels' series against the Rangers.
Skaggs was drafted by the Angels in the 1st round of the 2009 MLB Draft. He made his MLB debut in 2012 for the Arizona Diamondbacks, where he played until 2013. He later returned to the Angels where he's played ever since (he missed the 2015 season due to surgery).