The trade deadline was frenzied and spectacular, among the most active we've seen in recent years. If you're looking for a breakdown of all the trades and what they mean for Fantasy Baseball, allow me to direct you to that.

What I'm doing here is different. What I'm doing here is picking out which players gained the most value and which lost the most value as a consequence of the trade deadline. My picks aren't limited just to the players who were traded. Sometimes the players they're joining or leaving behind are the ones impacted the most.

Pretty straightforward, I think, so we'll jump right in with the five biggest winners followed by the five biggest losers.

Biggest winners
Trevor Story Colorado Rockies SS
He gets to stay in Colorado. That's victory enough for Trevor Story, who seemed like a sure bet to be traded given that he's in the final year of his contract for a non-contender. Like most Rockies hitters, his numbers away from Coors Field are lackluster, which would have given him longer odds of rebounding from a disappointing first half. He makes for a much more compelling buy-low candidate in Fantasy now that we know he's staying put.
Anthony Rizzo New York Yankees 1B
I've broken it down in greater detail elsewhere, but the bottom line is that Anthony Rizzo's left-handed swing seems perfectly tailored for Yankee Stadium. If he had played all his games there this year, Statcast estimates that he'd have 23 home runs rather than the 14 he actually has. The 31-year-old may seem like he's post-prime given his level of disappointment both this year and last, but he still makes contact at a high rate and is actually making harder contact than at any other point in his career. This move is exactly the sort that could rejuvenate him.
Reid Detmers Los Angeles Angels SP
By dealing Andrew Heaney to the Yankees, the Angels freed up a roster spot for their top pick in the draft last year, who has rocketed through the minors this year thanks to an unexpected velocity bump. Also armed with a pretty curveball, the left-hander compiled a 3.15 ERA, 1.10 WHIP and 15.9 K/9 en route to his promotion, having most recently struck out nine over six shutout innings in his Triple-A debut Sunday. He's not necessarily must-add in Fantasy, but he may quickly become that.
David Bednar Pittsburgh Pirates RP
Most of the closer vacancies created at the trade deadline don't have an obvious candidate to fill the void, but the Pirates' does. David Bednar has been their eighth-inning guy and clearly their best reliever apart from the now-departed Richard Rodriguez, compiling a 2.70 ERA, 1.08 WHIP and 11.3 K/9. Because he's a rookie and they're not looking to compete for anything for a while, they might choose to hold him back for salary suppression reasons, but probably not.
Tyler Clippard Arizona Diamondbacks RP
Tyler Clippard seems like a clear closer-in-waiting as well, and it may not have even taken Joakim Soria's departure for him to claim the role. He recorded the team's most recent save Wednesday, after all, in only his third game back from the IL. The 36-year-old has been sidelined all year by a shoulder injury but has a strong track record, including a 2.86 ERA, 0.86 WHIP and 9.2 K/9 the past two years. The Diamondbacks have no one else who's even remotely up to the task.
Biggest losers
Liam Hendriks Chicago White Sox RP
Either one of Liam Hendriks and Craig Kimbrel could be a significant loser, or they both could be moderate losers. They were two of the five most dominant closers in baseball, and now they play for the same team. Ken Rosenthal of The Athletic has suggested that the two could splits saves, which is the scenario that makes them both moderate losers, but I'm not sure of the justification for a split role given that they both throw right-handed. My guess is that Kimbrel takes the lead role with Hendriks setting up for him given that Hendriks has more experience as a setup man, but that's of course a bad scenario for Hendriks' Fantasy value.
Jose Berrios Toronto Blue Jays SP
Jose Berrios has never quite lived up to his ace billing but has settled in as a stable innings-eater with a good enough ERA and good enough strikeout rate. But now that he's going to a hitter's park in the division with the highest number of hitter's parks, he might not be able to sustain that tightrope walk anymore. He has routinely outperformed his xFIP, often by a considerable margin, which would suggest he's more vulnerable to the long ball that he has shown so far. This move could take his ERA from the mid threes to the low fours.
Luke Voit New York Yankees 1B
The Yankees didn't acquire Anthony Rizzo to sit him, which means Luke Voit suddenly doesn't have a place to play. You can understand why they don't feel like they can trust him anymore. He's been sidelined all but 29 games this year with a variety of injuries. But he's nearing a return from the latest, so then what? Playing without the DH spot in an NL park, the Yankees recently fielded an outfield of Giancarlo Stanton, Joey Gallo and Aaron Judge, so maybe that's Voit's ticket to the DH spot. Would the Yankees be willing to take that defensive hit every day, though? Seems like a stretch.
Kendall Graveman Houston Astros RP
Kendall Graveman finally looked settled as the Mariners closer after fending off Rafael Montero and other usurpers, but then the Mariners traded him to Houston, where he'll obviously set up for Ryan Pressly. Richard Rodriguez (traded to the Braves), Yimi Garcia (traded to the Astros) and Ranger Suarez (overtaken by Ian Kennedy) are others who figure to lose save chances because of deadline deals, but Graveman is the most significant. It's not as clear how the Blue Jays intend to divide saves between the incumbent Jordan Romano and the newly acquired Brad Hand.
Kris Bryant San Francisco Giants 3B
Going to Oracle Park is always a bad scenario for a hitter, even if it doesn't play quite as pitcher-friendly as it used to. Kris Bryant has struggled since the end of May and now will be playing half his games at a venue known for suppressing power. It's not even just the home runs in his case. With a swing geared for fly balls, his batting average figures to suffer as well. He'll still be a relevant contributor, of course, but he may drop a tier in the third base rankings.