After playing for local club IK Kongahälla, he joined the youth team of IFK Göteborg in 2004, before being promoted to the senior team in 2005. He quickly made a name for himself with his hard tackles, fighting spirit and generally fearless playing style. When Håkan Mild retired after the 2005 season, Wernbloom secured a place in the starting line-up. However, during the following season he struggled to retain his place as the club changed its playing style under new management. When striker Marcus Berg left to play for FC Groningenin the summer of 2007, Wernbloom switched to forward and was able to be a starter once again.
In January 2012, Wernbloom left AZ for signing a long-term contract with the Russian top club CSKA Moscow. Plagued by injuries, Wernbloom was plunged into the deep end against a highly favored Real Madrid side in the knockout stages of the Champions League. In the game against his alleged favorite club, he scored a dramatic half-volley in the dying minutes to equalize 1–1. After the final game of the 2017–18 season, CSKA Moscow announced that Wernbloom would be leaving the club at the end of his contract for family reasons. Wernbloom left CSKA Moscow after a successful six-year spell with the Russian team.
PAOK
On 16 August 2018, Wernbloom arrived in Thessaloniki to agree on personal terms with Greek club PAOK FC. Eventually he signed a three–year contract worth €1.1 million per year. On 17 December 2018, Wernbloom was unlucky in the away game against Levadiakos, as he suffered a Cruciate Ligament Rupture and would stay out of the action for several months, meaning PAOK will be without a key player as they look to win their first league title since 1985.
International career
He debuted for the Sweden under-21 side in 2006, scoring a goal in the 12th minute of the match. On 7 January 2007, he was picked for the Swedish national team's January Tour in South America, and he made his debut on 18 January against Ecuador. He won his 50th cap for Sweden on 29 March 2016, a 1-1 draw with the Czech Republic Pontus Wernbloom retired from international duty following Euro 2016. Wernbloom won 51 caps for Sweden, representing his country at Euro 2012 and Euro 2016.
Personal life
Wernbloom married girlfriend Nina in 2010 who gave birth to their son Mille the following year. He openly took a stance against Sweden Democrats prior to the 2010 Swedish general election, and stated his support for socialism in Aftonbladet.