There must be some regens, look in your youth team, there will be players that have only one line in their history tab, they are regens.
Here are the regen dates:
JANUARY
27.1 - Costa Rica
28.1 - Honduras, Jamaica, Guatemala, Panama, Nicaragua, Netherlands Antilles, Suriname, St Vincent, Guyana, Grenada, El Salvador, Cuba & Bermuda
FEBRUARY
23.2 - Azerbaijan, Bosnia & Herzeg., Estonia, FYR Macedonia, Kazakhstan, Latvia, Lithuania, Moldova, Montenegro, New Zealand, Georgia, Andorra, Albania, American Samoa, Fiji, Papua New Guinea, Samoa, Solomon Islands, Tonga, Vanuatu, Armenia & Malta
MARCH
2.3 - Mexico
7.3 - Australia, Croatia, France, Germany, Greece, Hungary, Israel, Northern Ireland,Scotland, Switzerland, Turkey, Ukraine & Wales
12.3 - Austria & England
16.3 - Slovakia
17.3 - Belgium, Czech Republic, Italy, Poland, Portugal, Cyprus & Indonesia
19.3 - Bulgaria, Slovenia & Romania
25.3 - Denmark & Netherlands
28.3 - Serbia & Spain
APRIL
2.4 - Argentina, South Africa & India
18.4 - Uruguay
MAY
7.5 - Mali
JUNE
6.6 - Barbados, Bolivia, Ecuador, Paraguay, Venezuela & Trinidad & Tobago
AUGUST
20.8 - Sweden & Hong Kong
27.8 - Canada, Iran, Iraq, Japan, Kuwait, Lebanon, Qatar, Saudi Arabia, Turkmenistan, U.A.E, Uzbekistan, Vietnam, Macau, Yemen, Thailand, Tajikistan, Syria, Sri Lanka, Philippines, Palestine, Pakistan, Oman, Northern Mariana Islands, Nepal, N. Korea, Mynamar, Mongolia, Maldives, Macau (China PR), Laos, Kyrgyzstan, Jordan, Guam, East Timor, Chinese Taipei, Cambodia, Brunei, Bhutan, Afghanistan, Bahrain & Bangladesh
29.8 - Burundi
SEPTEMBER
2.9 - Malaysia
7.9 - Chad
18.9 - Chile
19.9 - Brazil
20.9 - Russia, South Korea & U.S.A
22.9 - Iceland & Republic of Ireland
24.9 - Finland
27.9 - Colombia & Singapore
OCTOBER
2.10 - African teams (I've found this to be true if you don't have any African xml's loaded. If you do then dates tend to vary)
7.10 - China PR & Norway
15.10 - Peru
NOVEMBER
1.11 - Belarus