By Jennifer Piacenti The Vikings added a key fantasy playmaker to their already potent offense. In one of the first big fantasy dominoes to fall ahead of the 2022 NFL trade deadline, the Detroit Lions traded tight end T.J. Hockenson, a 2023 fourth-round pick and a conditional 2024 fourth-round pick to their NFC North division rival Minnesota Vikings for a 2023 second-round pick and a 2024 third-round pick. Vikings tight end Irv Smith Jr. suffered a high ankle sprain on Sunday versus the Cardinals and is expected to miss multiple weeks—not that he was having a very great fantasy season anyway. …