|Full name||Charles Melker Otto Hallberg|
|Date of birth||20 October 1995|
|Place of birth||Ljungbyholm, Sweden|
|Height||1.80 m (5 ft 11 in)|
(on loan from Udinese)
|2015||→ Vålerenga (loan)||10||(2)|
|2016||→ Hammarby (loan)||12||(0)|
|2016||→ Ascoli (loan)||7||(1)|
|2017–||→ Kalmar FF (loan)||0||(0)|
|* Senior club appearances and goals counted for the domestic league only and correct as of 28 January 2017.
‡ National team caps and goals correct as of 27 March 2017
Hallberg grew up in the small town of Ljungbyholm, shortly to the south of Kalmar. There he started with the local club Möre BK where he played for the first team in the seventh tier of Swedish football at age thirteen.
In 2010 Hallberg was brought into the Kalmar FF youth section. Two years later he became the youngest-ever first-team player for the club when he made his Allsvenskan debut at the age of sixteen. On July 15, 2012, Hallberg became the fourth-youngest Allsvenskan goalscorer of all time when he scored the game-winning 2–1 goal against IF Elfsborg. In December 2012 he signed a new four-year contract extension. After his second season in Allsvenskan as a seventeen-year-old, Hallberg was ranked as the 14th-best player in the league by newspaper Expressen.
In August 2014, Hallberg signed for Italian club Udinese. He made his debut in January 2015.
- As of 20 August 2014
- "Melker Hallberg". Svenskfotboll. Retrieved 14 April 2012.
- "Stortalangens första mål sänkte Elfsborg". Expressen. Retrieved 13 August 2013.
- "Fyraårskontrakt för Melker Hallberg". Kalmar FF. Retrieved 13 August 2013.
- "Tuffare Hallberg ska slå sig in på mitten". Östran. Retrieved 13 August 2013.
- "Här är allsvenskans 50 bästa spelare - år 2013" (in Swedish). Expressen. 6 November 2013. Retrieved 28 January 2014.
- "Hallberg tar nu plats i U21-landslagstruppen". Expressen. Retrieved 13 August 2013.
- "Eliteprospects.com - Melker Hallberg". Eliteprospects. 20 August 2014.
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