[7] During his stint at Randers, Schwartz was lovingly referred to by fans as Plaffeministeren ("The Minister of Shooting") for his many shots on target from long distance and tight angles.

[16] He made his debut on 30 July in a UEFA Europa League qualifier against Omonia Nicosia as a second half substitute, in a match finishing 0–0.

[17] In his first derby against Copenhagen on 27 September, he immediately made an impact in the fourth minute by injuring opposing defender Tom Høgli.

[20] He made his debut for the club on 28 February in a 2–1 away loss to FC Copenhagen, coming on as a substitute in the 64th minute for Mick van Buren.

[24] He left the club after his loan ended in June 2016, as a permanent transfer was deemed "unrealistic" due to financial limitations by Esbjerg fB staff member Niels Erik Søndergaard.

[30] Schwartz was officially announced as a new player of Sarpsborg 08 FF on 22 January 2018, signing a two-year contract with the Norwegian club.

[37] After a number of impressive performances with Silkeborg, including 37 goals in 47 league games, Schwartz was signed by FC Midtjylland in January 2020 on a two-and-a-half-year contract.

[38] He made his debut for the club on 17 February, coming on as a substitute in the 61st minute for Lasse Vibe against Lyngby BK, as Midtjylland won 2–0.

[40] Mostly a substitute at Midtjylland, Schwartz was part of the title-winning team of 2019–20,[41] as he also won the top goalscorers title with 18 goals – the majority of them scored for Silkeborg in the fall.

[46] In preparation for the 2021–22 season under new manager Nigel Adkins who had joined in March 2021, Schwartz had been demoted to practice with the U23 team in order for him to progress to his level of fitness.

[50] On 8 February 2023, Schwartz signed for Danish 1st Division club Hobro IK on a short-term contract until the end of the season.

[52] After being out of contract since July 2023, FC Fredericia confirmed on 27 March 2024 that the club had signed Schwartz on a short-term deal until the end of the season.

[54] Described as a "natural goalscorer", Charlton manager Lee Bowyer stated upon his signing in January 2021: "His finishing is very good, I witnessed it first hand in training today.