One reason Brodie Van Wagenen is the Mets’ general manager is because of what a good agent he was dealing with the Mets.

Sandy Alderson became more susceptible to losing his job because of a poor free-agent track record, which included deals with Yoenis Cespedes, Todd Frazier and Jason Vargas. All were represented by Van Wagenen’s old company, CAA — and Van Wagenen was the lead negotiator for Frazier and Cespedes (in tandem with Roc Nation).

Vargas and Frazier were part of a class of five free agents, along with Jay Bruce, Jose Reyes and Anthony Swarzak, that Alderson imported after the 2017 season. The cost was $88 million guaranteed for the Mets. The cost for Alderson — because of the high price tag and low production — was his job; especially since the biggest gamble of his Mets tenure, Cespedes, also broke down physically.

Van Wagenen is in the unique position of inheriting as a GM contracts he helped negotiate for the players. As an agent, Van Wagenen insisted he wanted the deals to work for both sides. But it is not working out great for his current side, with either the players he helped bring to the Mets as an agent or as a GM.

When contacted Monday, Van Wagenen did not want to comment on large swaths of players and their performances. Understandable. It is not even a quarter of the way through his first season. Performance changes. Think about, for example, how the average Yankees fan viewed Clint Frazier, Tommy Kahnle and Gary Sanchez when the season began or how much patience was needed to get the performance the team is now deriving from Domingo German.

Or even think about Vargas, who three weeks ago was as big a problem as the Mets had and of late was competently filling the No. 5 spot.

So consider this a snapshot at a down time — the Mets had lost 14 of 21 heading into a series in San Diego.

Frazier was hitting .146 this year. Perhaps he still can combine enough power and defense to help the 2019 club before his contract expires. The best the Mets could say about Cespedes is that they have insurance on his contract. He played in 119 games over the first two seasons of his four-year, $110 million pact, hasn’t played at all this season after double heel surgery and maybe can be a factor in the last month or two of 2019.

Among those whom Van Wagenen has imported as GM, the small acquisition of J.D. Davis has worked out the best. However, the small acquisition of Keon Broxton has been a detriment.

Edwin Diaz, even with his recent homer blip, has been strong, but to get him the Mets had to absorb the final five seasons at $110 million of Robinson Cano’s contract. They were able to defray some of that by having Seattle take Bruce ($28 million) and Swarzak ($8.5 million) and eat $20 million.

Cano served an 80-game suspension last season for violating MLB’s performance-enhancing drug policy. Van Wagenen said he had insights into what occurred, having been Cano’s representative at the time, which made him comfortable in acquiring Cano, even at 36. Cano has been cited by teammates for leadership, but after being hit twice on his hands, lately his numbers have dropped (.246 average/.689 OPS). Meanwhile, the key prospect the Mariners obtained, Jarred Kelenic, was hitting .337 at Low-A with a 1.050 OPS. Justin Dunn had a 3.20 ERA and 11.7 strikeouts per nine innings at Double-A.

This is clearly one to follow for several years to judge how Cano ages and Kelenic/Dunn progress.

Meanwhile, the $79 million Van Wagenen invested in free agency is not paying off yet, either. Jeurys Familia and Justin Wilson both had spent time on the injured list, and Familia was not pitching well before his injury. Jed Lowrie has yet to play. Wilson Ramos is the biggest part of what FanGraphs has as the NL’s worst catching group by Wins Above Replacement. That also includes Travis d’Arnaud, whom the Mets tendered ($3.515 million) in the offseason and released after just 25 plate appearances.

The acquisitions to provide organizational pitching depth such as Luis Avilan, Walker Lockett and Hector Santiago did not work out well enough to prevent the Mets from having to trade Monday for Wilmer Font.

Again, this is all just a snapshot. Van Wagenen’s administration will not be judged by those whom he got jobs as an agent or the first six weeks of games as GM. But this has been, at best, a poor quality snapshot.