[1] He made his professional debut in 2017 with the Dominican Summer League Nationals, hitting .139/.199/.228 with two home runs and nine RBI over 45 appearances.
[2] He made 10 appearances for the rookie–level Gulf Coast League Nationals, struggling to a 6.59 ERA with 13 strikeouts over 13+2⁄3 innings pitched.
[3] On July 31, 2019, Alvarado, Aaron Fletcher, and Taylor Guilbeau were traded to the Seattle Mariners in exchange for Hunter Strickland and Roenis Elías.
[7] He split 2022 between the Single–A Lakeland Flying Tigers, High–A West Michigan Whitecaps, and Double–A Erie SeaWolves, registering an 8–3 record and 2.72 ERA with 63 strikeouts and 10 saves across 58+2⁄3 innings pitched.
[11] In 41 appearances split between the Single–A Jupiter Hammerheads and Triple–A Jacksonville Jumbo Shrimp, he accumulated a 3–4 record and 2.66 ERA with 74 strikeouts and 11 saves across 50+2⁄3 innings pitched.