Friday featured a MAJOR shakeup to the first round of the 2021 NFL Draft, with the 49ers moving from No. 12 to No. 3 in a deal with the Dolphins. Miami then turned around and immediately jumped from No. 12 up to No. 6 in an ensuing trade with Philadelphia. Is your head spinning yet? I'm here to help! Below you'll find a four-round mock draft that reflects Friday's trade frenzy, with San Francisco pouncing on a quarterback in its new draft slot. And actually, I don't see the Niners being the last team to move up for a signal-caller -- not when there's a fifth QB shooting up draft boards. And before we get to the picks, I want to quickly explore that emerging storyline ...